統計と確率
データ分析、確率分布、仮説検定、統計手法。
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6 from unit 1, lesson 13 a group of pennies made in 2018 are weighed. t…
# Explanation: ## Step1: Calculate the mean of the painting - data The formula for the mean $\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}$, where $n = 10$ and $x_{i}$ are the data - po…
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use the frequency distribution shown below to construct an expanded fre…
| Class | Frequency, f | Midpoint | Relative frequency | Cumulative frequency | | ---- | ---- | ---- | ---- | ---- | | 20 - 30 | 17 | 25 | 0.05 | 17 | | 31 - 41 | 44 | 36 | 0.12 |…
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heres a question to make sure you got that: what does it mean to square…
A. Multiply the number by itself.
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determine whether the variable is qualitative or quantitative. explain …
The variable is quantitative because heights are numerical measurements.
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identify the sampling techniques used, and discuss potential sources of…
What type of sampling is used? B. Convenience sampling is used, because students are chosen due to convenience of location. What potential sources of bias are present, if any? A. …
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5 multiple choice 1 point how do you properly cite a book source in apa…
5. Smith, J. (2020). The Psychology of Influence. New York: Random House. 6. Plagiarism and a violation of academic integrity policies. 7. False 8. True
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determine whether the approximate shape of the distribution in the hist…
D. The shape of the distribution is skewed right because the bars have a tail to the right.
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determine whether the underlined number describes a population paramete…
C. The number is a sample statistic because it describes the people in a sample, which is a subset of all of the people in the country
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you are applying for a job at two companies. company a offers starting …
B. Company B, because data values that lie within one standard deviation from the mean are not considered unusual
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multiple choice 2 points solve the linear equation. -24 - 3x = 3 no sol…
$x = - 9$ ### Question 26
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identify the explanatory variable and the response variable. a farmer w…
The explanatory variable is the type of fertilizer. The response variable is the harvest of the crop.
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a survey of 1021 u.s. adults found that 45.1% have a favorable view of …
1. D. The responses of all U.S. adults 2. A. The 1021 U.S. adults selected 3. A. 45.1% of the 1021 U.S. adults who have a favorable view of Cuba and 54.9% of the 1021 U.S. adults …
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isis means of funding for terrorism operations consist of ________; whe…
ISIS: oil - smuggling, extortion, looting; Taliban: drug - trafficking, extortion, donations
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identify the sampling techniques used, and discuss potential sources of…
What type of sampling was used? C. Simple random sampling was used, since each number had an equal chance of being dialed, so all samples of 1400 phone numbers had an equal chance…
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match each description to its meaning. match term definition la luge a)…
La luge - D Le ski alpin - C Black diamond - B Skeleton sled - A
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1 multiple choice 2 points which system of justice is practiced in the …
1. B. the adversarial system 2. A. True 3. B. False 4. A. Crime Control Model
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in a recent survey, 8 people were each asked the number of times they h…
17
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data were collected from libraries about the number of patrons who have…
A patron who has been using the library for 13 years is predicted to have less than 1 overdue book.
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18 numeric 10 points the z - score of a basketball player is in the 29 …
- 0.55
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the running times for the 100 are posted by the ohs track team is norma…
$-2.375$
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15 multiple choice 10 points a grocery store received three shipments o…
The shipments from all three farms are all likely to have an approximately equal number of bags that weigh less than 19 oz.
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14 multiple choice 10 points mohammed annoys mr. r on a regular day bas…
0.00065% (closest to 0.0006% among the options)
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desi plays basketball for ohs and the coach measures desi by his shoe t…
5; 2 Categorical & 3 Quantitative (Shoe type, Shooting Form, PPG, SPG, APG)
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13 multiple choice 10 points desi plays basketball for ohs and the coac…
5; 2 Categorical & 3 Quantitative (Shoe type, Shooting Form, PPG, SPG, APG)
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question 20 (1 point) (01.03 mc) lee la frase en negrita y escoge la pa…
B. Logros
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12 multiple choice 10 points when comparing the distribution of favorit…
Pie Chart
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11 multiple choice 10 points when interpreting boxplots from two sample…
B. Since both samples display distinct characteristics relating spread, it is important to balance insights gathered from IQR and outlier analysis rather than favor one over anoth…
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question 21 (1 point) (01.03 lc) lee la frase en negrita y escoge la pa…
c. La comprensión
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10 multiple choice 10 points the iqr of a box plot has 3 quartiles. q1 …
C. 25%
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jeanfrank works as a server in a small restaurant, where he can earn a …
The higher value of tips for Jeanfrank aren't automatically considered an anomaly, however, they are just less common in this workday; There is a positive skew for Jeanfrank's tip…
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multiple answer 10 points. the running times for the 100 are posted by …
The player's time is in the 3 SD to the left, The player's time is an anomaly
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multiple answer 10 points. the running times for the 100 are posted by …
The player's time is in the 3 SD to the left The player's time is an anomaly
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the running times for the 100 are posted by the ohs track team is appro…
The player's time is in the 3 SD to the left.
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5 multiple choice 10 points the distribution of long - jump distance in…
Satchel's distance was at the 30th percentile of the distribution and was less than Brooke's distance.
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if the scores on a standardized test are normally distributed with a me…
Approximately 68%
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3 multiple answer 10 points select all that apply to right skewed distr…
C. Positive Skew D. The Mean is greater than the Median
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2 multiple - choice 10 points which of the following best explains why …
The data may be too sparse, leading to an unreliable visualization that does not reflect the true spread and shape of the data set.
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which of the following best explains why a histogram with several gaps …
The data may be too sparse, leading to an unreliable visualization that does not reflect the true spread and shape of the data set.
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which of the following best explains why a histogram with unequal bin o…
The bins are too wide, which might over - smooth variability in the data and obscure important features.
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1 multiple choice 10 points when comparing sat scores that are normally…
To compare individual scores in relation to their group's average performance while accounting for variability within each group.
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a group of 126 doctors and nurses volunteered to run a health fair. eac…
(a) \(0.67\) (b) \(0.36\)
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martina is training for a cycling race. she recorded the distance (in k…
(a) 40 (b) The same number of rides had a distance under 28 as had a distance over 28. (c) 38 to 50
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martina is training for a cycling race. she recorded the distance (in k…
(a) 35 (b) The same number of rides had a distance under 28 as had a distance over 28. (c) 38 to 50
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data analysis and probability interpreting a box - and - whisker plot: …
(a) The number of plants sold was above 60 on more days than it was below 60. (b) 60 to 64 (c) 12
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4. in a statistics class of 40 students, the final grades were given as…
(a) The data is ordinal. (b) | Grade | Frequency | | ---- | ---- | | A | 7 | | A- | 5 | | B | 6 | | B+ | 9 | | B- | 3 | | C+ | 2 | | D | 4 | | F | 4 |
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the word decagon contains the root dec. what does the root dec mean? on…
ten
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3. twenty - five army inductees were given a blood test to obtain their…
| Blood Type | Frequency | |----|----| | A | 7 | | B | 8 | | AB | 4 | | O | 6 | This is nominal data.
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select the word that means a refusal to buy or use something in order t…
Boycott
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4. identifying themes what role did religious freedom play in the found…
4. Religious freedom was a key factor in Rhode Island's founding, attracting those seeking to practice their faith without persecution. 5. Resolved through treaties, land - relate…
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the word automobile contains the root auto. what does the root auto mea…
own or self
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2. a mathematics professor decides to select a sample of 5 students fro…
a) The population size is 50. The ratio of population size to sample size is $\frac{50}{5}=10$. b) Since it is systematic sampling and the first - selected student number is 8, an…
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1. a mathematics teacher marked a set of 30 exam papers. the grades are…
(b) 10
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this sign means: another road crosses yours another lane is merging wit…
Another road crosses yours
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question 6 0.2 pts research into the personal and cognitive characteris…
A. Diffusion
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a) state the random variables. rv x = the length of metacarpal of a ran…
b) The symbol is $r$ and the value is $0.628$. There is a strong positive linear relation between length of metacarpal and height for sets of skeletal remains. c) The symbol is $R…
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the probability of event a is 0.48, the probability of event a and b is…
D. 0.62
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every person has blood type o, a, b, or ab. a random group of people ar…
The probability that a randomly chosen person from this group has type B is $\frac{3}{25}$. The probability that a randomly chosen person from this group has type AB is $\frac{1}{…
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josiah takes a multiple - choice quiz that has three questions. each qu…
$\frac{1}{125}$
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this week in school, there is a 75 percent probability of having a fire…
A. No, because $P(F\cap T) eq P(F)\cdot P(T)$
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the names of the months are each written on a slip of paper. if a slip …
ends with an r and has five or fewer letters
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a pharmaceutical company collects data on the side effects participants…
5 percent
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which events are independent? check all that apply. each number 1 throu…
A number cube is rolled and a spinner is spun. Henry rolls a multiple of 2 and lands on a red portion of the spinner; Two cards are randomly chosen from a standard deck. Eliza cho…
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a bag contains the following fourteen marbles. deepak randomly chooses …
$P(\text{green})=\frac{5}{14}$ $P(\text{red})=\frac{1}{7}$ $P(\text{green and red})=\frac{5}{98}$
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a bag contains eight tiles labeled f, g, h, i, j, k, l, and m. one tile…
$\frac{1}{8}$
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a six - sided die with sides labeled 1 through 6 will be rolled once. e…
$\frac{2}{3}$
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on a survey, 5 students reported how many minutes it takes them to trav…
$6.8$
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a pet store has 7 cats. here are their weights (in pounds). 10, 9, 13, …
$10.4$ pounds
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question 14 (5 points) (mc) public domain which of the following proble…
C. the separate - but - unequal conditions for African Americans
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what issue with lincoln and johnsons reconstruction plans is this carto…
C. the idea that the plans were mending the nation without resolving the fundamental conflicts at the root of the division between North and South
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3 tries left which of the following would indicate the weakest relation…
+0.01
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what does taxation without representation mean? (u2.1) (1 point) the de…
The colonies had no voting representatives in Parliament (Britain's Congress), and therefore no one to act in their interests. Yet, Britain imposed taxes on the colonists.
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four runners, fran, gloria, haley, and imani, compete on a relay team. …
C. \(S=\{FGI, FIG, GFI, GIF, IFG, IGF\}\)
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a random number generator is used to create a list of 150 single - digi…
38%
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joe, keitaro, and luis play tennis. to decide who will play against eac…
A. $\{KL\}$
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a jar contains 3 red marbles, numbered 1 to 3, and 7 blue marbles numbe…
a) $\frac{1}{3}$ b) $\frac{1}{2}$
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the equation for the least - squares regression line is (y = 116.4169-1…
$73.6$
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lamont has a bag of marbles with 5 blue marbles, 4 white marbles, and 6…
a) $\frac{1}{7}\approx0.1429$ b) $\frac{4}{35}\approx0.1143$ c) $\frac{2}{91}\approx0.0220$
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temperatures: following are average temperatures, in degrees fahrenheit…
$\hat{y}=67.0746 + 0.3194x$
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dante buys a bag of cookies that contains 5 chocolate chip cookies, 8 p…
$0.0362$
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april is randomly choosing five cds to bring in her car from the follow…
choosing five CDs where not all of them are pop
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two students from a group of eight boys and 12 girls are sent to repres…
$\frac{62}{95}$
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the table shows the results of a survey in which 10th - grade students …
$70\%$
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round all answers to 4 decimal places. a. a bag contains 6 yellow marbl…
a. 0.1116 b. 0.0909
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there are 6 white and 4 orange ping - pong balls in a brown paper bag. …
a) 10 b) 0.4 c) 0.333 d) 0.133
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a spinner has five congruent sections, one each of blue, green, red, or…
The theoretical probability of spinning any one of the five colors is 20%. The theoretical probability of spinning green is equal to the experimental probability of spinning green…
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section 5.4 homework score: 5.47/14 answered: 6/14 question 7 a home pr…
$P(\text{Positive}|\text{Pregnant})\approx0.9524$ $P(\text{Pregnant}|\text{Negative})\approx0.0548$
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a) are believing that the earth is warming and being a liberal democrat…
a) not mutually exclusive b) 0.7600 c) 0.5294 d) 0.3333 e) dependent
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a) are believing that the earth is warming and being a liberal democrat…
a. not mutually exclusive b. (Value depends on correct data extraction from the image, assume calculation using \(P(A|B)=\frac{P(A\cap B)}{P(B)}\)) c. (Value depends on correct da…
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which word means to be treated badly over a long period of time? * segr…
1. B. opresión 2. A. segregación 3. B. discriminación
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3. what does abdicate mean? 4. charles v felt his empire was too large …
3. To renounce one's throne, power, or responsibility. 4. Spanish - Habsburg monarchy was ruled by Philip II; Holy Roman Empire and Austrian - Habsburg lands were ruled by Ferdina…
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a 2010 pew research poll asked 1,306 americans from what youve read and…
a. not mutually exclusive b. 0.7600 c. 0.5294 d. 0.3333 e. belief in global warming and party ideology are dependent f. 0.1765
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giving a test to a group of students, the grades and gender are summari…
a. $0.4906$ b. $0.1321$ c. $0.6981$ d. $0.2188$
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six students, michelle, nadir, olivia, parvi, quinn, and richard, are r…
$\frac{2}{3}$
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what did reagans \peace through strength\ cold war approach mean? he wa…
He wanted to increase the national defense.
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four numbers from the set 0 to 9, including 0 and 9, are used to create…
How many possible outcomes exist for the situation? 5040 How many possible outcomes begin with a 0? 504 What is the theoretical probability of choosing a personal identification n…
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among a total of students, the grades and gender are summarized below. …
The probabilities for parts a - d are approximately: a. $0.5574$ b. $0.1148$ c. $0.7377$ d. $0.175$
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giving a test to a group of students, the grades and gender are summari…
a. $0.4906$ b. $0.1321$ c. $0.6981$ d. $0.2188$
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section 5.4 homework score: 2.2/14 answered: 3/14 question 3 score on l…
a. \(0.2857\) b. \(0.4624\) c. \(0.2366\) e. \(0.0676\)
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a farmer has an orchard that covers an area of 40 acres. he grows apple…
37.5%
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a cbs news poll involved a nationwide random sample of 651 adults, aske…
a. $P(\text{Republican})\approx0.286$ b. $P(\text{worse})\approx0.460$ c. $P(\text{worse}|\text{Republican})\approx0.237$ d. $P(\text{Republican}|\text{worse})\approx0.147$ e. $P(…