Estadística
Análisis de datos, distribuciones de probabilidad y pruebas de hipótesis.
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a fishing tournament was held last year at the fishing academy. the org…
(a) We can tell by the IQR that the middle half of the data set is 4 units wide. (b) The "average" fish (in lb) was about 19 or 20, based on the mean and median. (c) Graph 2 (The …
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our class recorded the temperature at noon each day for 45 school days …
(a) The difference between the largest and smallest temperature (in °F) is 8. (This is the range.) (b) Looking at the mean and median, we see that a "typical" day had a temperatur…
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consider the data set shown in the table. | x | 0 | 1 | 2 | 3 | 4 | 5 |…
$y=-0.05x^{2}+0.44x + 1.60$
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gadabout tour company gave bus tours last summer. the tour director not…
(a) The middle half of the data set is 4 units wide. (This is the IQR.) (b) Based on the median and mean, we see that the "average" number of people served was about 51 or 52. (c)…
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1 once more 2 choose means to select or to pick out. chose is the past …
a. choose b. chose c. chose d. choose
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the table shows the total number of posts made by the average registere…
$p(x)=2.4x+0$
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a zoo has some new exhibits. in a survey, 1600 zoo attendees are asked …
| Type of animal | Percentage | |--|--| | Penguin | 12% | | Gorilla | 15% | | Anteater | 38% | | Jaguar | 24% | | Koala | 11% |
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a survey asked 150 students to choose their favorite type of movie. the…
| Type of movie | Percentage | |--|--| | Animation | 6% | | Science fiction | 30% | | Horror | 46% | | Adventure | 18% |
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each hour, for several hours, the owner of a bakery recorded the number…
(a) 30 (b) 15 (c) 25
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each hour, for several hours, the owner of a bakery recorded the number…
(a) 30 (b) 15 (c) 25
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(c) data was collected at a tennis court. it showed that being older im…
There is a correlation between age and length of stay. However, there is no causation. This is because there is a decrease in the length of stay with an increase in age.
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ralph waldo emerson assignment active determine the authors argument ba…
- go out into nature and commune with the divine - experience real solitude to truly perceive nature - realize that individuals are meant to learn from nature and transcend it - t…
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explain the difference between parameter and statistic.
A parameter describes a population, while a statistic describes a sample.
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explain the difference between population and sample. question 4 explai…
A population is the whole group of interest, while a sample is a subset of the population used for study.
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define stratified sampling. give an example of when stratified sampling…
Stratified sampling is a sampling method where the population is partitioned into non - overlapping subgroups (strata) and samples are randomly drawn from each stratum in proporti…
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among 51 - to 56 - year - olds, 29% say they have written an editorial …
$0.9090$
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define random sampling. give an example of when random sampling is pref…
Random sampling is a sampling technique where every element in the population has an equal probability of being selected. An example of when it is preferred is estimating the aver…
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among 51 - to 56 - year - olds, 29% say they have written an editorial …
$0.0886$
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among 51 - to 56 - year - olds, 29% say they have written an editorial …
(a) $0.0002$ (b) $0.9998$
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among 51 - to 56 - year - olds, 29% say they have written an editorial …
$0.0001$
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among 51 - to 56 - year - olds, 29% say they have written an editorial …
$0.0001$
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in 1970, 85% of 30 - year - olds in a country earned more than their pa…
$0.9997$
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in 1970, 85% of 30 - year - olds in a country earned more than their pa…
$0.9995$
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in 1970, 85% of 30 - year - olds in a country earned more than their pa…
$0.8031$
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in 1970, 85% of 30 - year - olds in a country earned more than their pa…
$0.7225$
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in 1970, 85% of 30 - year - olds in a country earned more than their pa…
$0.8500$
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a test to determine whether a certain antibody is present is 99.9% effe…
(a) $0.9930$ (b) $0.0070$
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about 17% of the population of a large country is hopelessly romantic. …
(a) $0.0289$ (b) $0.3111$
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quick self - quiz: association, causation, and confounding variables an…
1. a) Just association b) Temperature 2. a) Implies causation b) Overall lifestyle 3. a) Just association b) Basketball experience 4. a) Observational study b) Experiment
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amy compared the player statistics from her teams soccer season. she de…
There is a correlation between playing time and number of goals. However, there is no causation. This is because there is a decrease in the number of goals with a decrease in play…
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a produce stand conducted a study. it showed that a customer does not t…
There is no correlation between amount of fruit bought and number of samples offered. However, there is no causation. This is because there is probably an increase in the amount o…
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once you start making a budget, it will become easier to what? get into…
B. live within your means
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a piano instructor examined student progress. he noticed that when stud…
(a) There is a correlation between amount of time spent playing video games and memorization ability. There is probably also causation. This is because there is an increase in mem…
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a computer manufacturer conducted a survey. it showed that a younger cu…
(a) There may or may not be a correlation between age and purchase price. Further studies would have to be done to determine this. (b) There is a correlation between outside tempe…
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this assignment must be submitted before the 1.3 quiz. late work will n…
## Example 1: ### a) Association ### b) Causation ### c) Association ## Example 2: ### a) No ### b) Stress levels ## Example 3: ### a) Confusing correlation with causation ### b) …
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true/false: muerto means \lost.\ true false
False
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which word means \your brothers wife?\ padre tía cuñada hermano
C. cunada
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the circle graph represents places a travel agents clients traveled for…
B. 120
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school enrollment there are currently 420 freshmen enrolled in the high…
C. 234
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approximately how many more vehicles travel along this route on thursda…
C. 8,000
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you measure 37 textbooks weights, and find they have a mean weight of 5…
$52.7395<\mu<55.2605$
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cartoon analysis: 2 views on the league of nations give her the key to …
Left - hand cartoon: The League of Nations is seen as a means to restrain aggression. Right - hand cartoon: The League of Nations is portrayed as an idealistic and perhaps fragile…
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multiple - choice question -8 + 3 = 5 -5 rewatch absolute value, which …
-5
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a car dealership conducted a survey. it showed that a younger customer …
(a) There is a correlation between age and purchase price. There may or may not be causation. Further studies would have to be done to determine this. (b) There is a correlation b…
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answer the questions below. (a) a researcher measured the shoe size and…
(a) There is no correlation between shoe size and math ability. (b) There is a correlation between amount of bread bought and amount of rice purchased. There may or may not be cau…
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a yoga instructor collected student data. he found that students who ha…
(a) There is a correlation between amount of sleep and range of motion. There may or may not be causation. Further studies would have to be done to determine this. (b) There is a …
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88 multiple choice a furniture company makes couches of differing dimen…
C. The median length of the couches produced will increase by 3 inches.
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mean: 7.50 median: 7.75 mode: 7.00 range: 1.00 iqr: 0.50 the measures o…
B. The 7th competitor had a jump that was much shorter than the previous 6 competitors.
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the times (in seconds) of 8 runners for the 100 - yard dash are recorde…
Mean: \(13.3\) Median: \(13.7\) Mode: \(14\) Range: \(3.2\) IQR: \(2.4\)
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the following were calculated from the times (in minutes) that 10 indiv…
C. The range will decrease., D. The mean will decrease.
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multiple choice each ordered data set below has a median of 28. which d…
C. 23, 24, 27, 28, 28, 32, 39, 45
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multiple choice at the end of the semester, mrs. johnson allows her stu…
B. Jonah's average test score will increase.
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88 multiple choice the amount of tips (in dollars) servers earn triples…
C. If the most common tip a server usually earns for serving only a cup of coffee is $\$1.25$, on holiday weeks they will usually earn $\$3.75$.
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88 multiple choice a shoelace company makes shoelaces of differing leng…
C. The median length of the shoelaces produced will increase by 3 centimeters.
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14. high blood pressure according to the u.s. centers for disease contr…
a) $\frac{69}{31}$ b) $\frac{31}{69}$ ### 16.
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situation mrs. harrison can watch 15 tik toks in 5 minutes. how many ca…
Mrs. Harrison can watch 3 tik - toks in 1 minute. The equation is $y = 3x$, where $y$ is the number of tik - toks, $x$ is the number of minutes, and 3 is the unit rate (number of …
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write an equation to represent the situation. label each part. describe…
The equation representing the situation is \(y = 3x\). The graph is proportional because the ratio of \(y\) to \(x\) is constant (\(y/x=3\) for all non - zero \(x\) values in the …
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mohamed wants to know if the amount of candy he eats correlates to the …
$y = 0.025x-0.58$
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name: jayleigh s. block: btw equation write an equation to represent th…
Equation: $y = 3x$; The graph is proportional because $\frac{y}{x}$ is constant and the line passes through the origin. For the point $(2,6)$, it means when $x = 2$, $y = 6$. The …
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situation mrs. harrison can watch 15 tik toks in 5 minutes. how many ca…
Mrs. Harrison can watch 3 TikTok videos in 1 minute. The equation is $y = 3x$, where $y$ is the number of TikTok videos and $x$ is the number of minutes.
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1) the first amendment: why is this such an important amendment? what w…
1. It is important for protecting fundamental freedoms. Implications would be loss of free expression and democratic participation. 2. It is a debated right in modern times. The g…
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7) your school has a pep rally in the gymnasium. the following is a map…
(a) Assign numbers 1 - 600 to seats. Generate 40 distinct random numbers in 1 - 600. Select students in corresponding seats. (b) Calculate 10 students per class. Generate 10 disti…
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digits in exercises 6 - 9, each of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8…
6. $\frac{1}{2}$ 7. $\frac{4}{5}$ 8. 1 9. $\frac{1}{5}$
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fourteen legislative seats are being apportioned among 3 states resulti…
D. 3, 7, 4
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think deeply about and • what is the purpose of education for you? • wh…
I believe the purpose of education is to cultivate well - rounded individuals who can think independently and contribute positively to society. For me, teaching means creating a n…
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sample: 20 teachers 3) you group the teachers by the content area taugh…
3. Stratifying; Math teachers, English teachers, Science teachers (examples) 4. Clustering; Lion group, Dolphin group (examples) 5. Clustering; Group 1, Group 2 (examples) 6. Stra…
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5. television news in a small town, 250 people were asked whether they …
$0.32$
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question in 1935, economics nobel prize winner john hicks made a commen…
Monopolies may bank their profits and slack off on trying to please their customers. The problem of inefficiency for monopolies often runs even deeper and involves inefficiency ov…
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data are collected on the 35 students in a college history course. whic…
E. Number of students in the data set
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a certain store has 3,000 employees working at its main location in a c…
B. The stratified sample assures that the opinions of employees from both locations will be represented.
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the president of a small company needs to collect data on the education…
A. A census
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5 mark for review which of the following is a benefit to using a random…
C. The results of the observational study can be generalized to the population.
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a sample of students will be selected from all the students at a high s…
B. Randomly choose five classrooms in the school and use all the students in those classrooms for the sample.
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unit 3: collecting data hw 2 - sampling methods directions: use the tab…
1) Trea Turner, Michael Taylor, Anthony Rizzo, Anthony Rendon, Albert Almora, Addison Russell 2) Mr. Taylor, Mr. Brown, Mrs. Garcia, Miss Clark b) Random selection reduces bias an…
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an article reports that blue - eyed people earn less than brown - eyed …
A. The results are nowhere near to being statistically significant.
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question 25 a slot machine has 3 dials. each dial has 30 positions, one…
A. $1/(30\times30\times30)=1/27000 = 0.00003$ or $0.003\%$
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a video game allows a player to create a clothes outfit by choosing 1 o…
C. 1 in 24
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two owners of a cattle ranch, jose and valeria, want to find the averag…
B. 20
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about 8% of the u.s. population catches the flu each season. assuming e…
D. 1 in 12
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both sets of values have an average of 13. is set as standard deviation…
D. Smaller
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complete the text with the better conjunctive adverb. on d - day, june …
Indeed
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a person will randomly win 1 of 5 prizes. the cash values of the 5 priz…
D. $5\times(1/5)+10\times(3/5)+20\times(1/5)=11$
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question 12 kay has an 80% probability of making a free throw in basket…
$64\%$ (B. 64%)
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answer the following. round your answers to the nearest thousandths. (a…
(a) 0.3 (b) False (c) As the number of spins increases, we expect the experimental and theoretical probabilities to become closer, though they might not be equal.
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sixteen cyclists were each asked the number of miles they biked last we…
| Class Interval | Frequency | | ---- | ---- | | 0 - 3 | 3 | | 4 - 7 | 3 | | 8 - 11 | 3 | | 12 - 15 | 3 | | 16 - 19 | 6 | To construct the histogram: - On the x - axis, label the …
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a survey finds 52% of surveyed voters plan to vote for smith with a mar…
A. If the same survey were done repeatedly, 95% confidence exists that the proportion of the population voting for Smith is between 51% and 53%.
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the scatter plot shows the time - spent texting, x, and the time spent …
(a) 8.53 hours (b) 5.61 hours (c) 0.73 hours
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paragraph 8: a fairer path forward the argument against charging juveni…
1. It means holding juveniles accountable while also showing compassion by guiding rather than just punishing, considering their brain development. 2. It makes us view justice as …
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the monthly rents (in dollars) paid by 9 people are given below. (note …
(a) It stays the same. (b) It decreases by 20.
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15. although companies would like consumers to believe that identity th…
a. The formula for the mean is $\bar{x}=\frac{1}{n}\sum_{i = 1}^{n}x_i$, and the mean is $\$16.12$. b. | Price ($x$) | Frequency ($f$) | |---|---| | 9.99 | 1 | | 10 | 4 | | 12 | 1…
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if the pointer in the figure is spun twice, find the probability that t…
The problem seems incomplete as the figure is not provided. However, if we assume the probability of landing on yellow in a single - spin is \(\frac{1}{16}\), and the spins are in…
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14. the new york premier theater is hosting a concert at which all proc…
a. | Seat Type | Price | Number of Seats | |--|--|--| | Rear Mezzanine | 150 | 54 | | Middle Mezzanine | 200 | 87 | | Front Mezzanine and Orchestra | 300 | 512 | | Front and Cente…
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use the following table to answer questions 11 - 13. jouen attends stat…
11. $73$ 12. $74$ 13. $\frac{1}{4}\sum_{i = 6}^{9}x_i\approx76$
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1a. write the sigma notation mean formula for the three consecutive - m…
$\bar{x}=\frac{1}{3}\sum_{j=0}^{2}x_{i + j}$ (where $i$ ranges from 1 to 10)
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a board game uses the deck of 20 cards shown to the right. two cards ar…
There are 5 monkeys and 5 frogs in the 20 - card deck. The probability that the first card shows a monkey is $\frac{5}{20}=\frac{1}{4}$. After the first - card draw (without repla…
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a board game uses the deck of 20 cards shown to the right. two cards ar…
There are 5 monkeys and 5 frogs in the 20 - card deck. The probability that the first card is a monkey is $\frac{5}{20}=\frac{1}{4}$. Since the selection is with replacement, the …
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8. write the formula for the mean cell phone bill for the last six mont…
The formula for the mean is $\frac{1}{6}\sum_{i = 1}^{6}x_i$ and the mean (using example values) is approximately $\$56.33$.
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a board game uses the deck of 20 cards shown to the right. two cards ar…
The discipline is Mathematics, and the sub - field is Statistics. The probability that both cards selected without replacement have a 1: The total number of cards is \(n = 20\). T…
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8. write the formula for the mean cell phone bill for the last six mont…
11. $73$; This is the average monthly cable bill for the 9 - month period. 12. $74$; This is the average monthly cable bill for the first 4 - month period. 13. The formula is $\fr…
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paragraph 7: the cost of lost potential every young person has the pote…
1. Charging juveniles as adults stops them from developing their positive potential. 2. Through education and therapy, they can become mentors, workers, or community leaders. 3. S…