Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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question 12 the word abolition means _______ the act of setting free th…
The act of doing away with
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question 10 5 pts when douglass states, i loathed them as being the mea…
Intense hate, dislike
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question 9 to douglass, the word sustain means ________ take away puzzl…
To maintain, to keep going, support
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learning to read and write vocabulary quiz started: sep 13 at 3:47pm qu…
The act of setting free
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question 7 5 pts after reading “the columbia orator,” douglass claimed …
Conversation between two or more
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a student repeatedly rolls a die. z is the furthest distance away in wh…
continuous
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x is the amount of time that a randomly chosen student has spent out of…
continuous
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question 6 5 pts used within the context of douglasss literacy narrativ…
Discreet, secretive
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question 5 when douglass says that \slavery proved its ability to dives…
C. Take away
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bestow is a word which means __________ to give, put upon, to honor int…
To give, put upon, to honor
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my mistress did not “perceive that i sustained to her the relation of a…
B. Personal, moveable property
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question 2 5 pts in the following direct quotation, my mistress treated…
C. Animal - like, beast like.
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in the following line, \i was compelled to resort to various stratagems…
C. Clever plan
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if there are 5,200 registered voters are randomly sampled, which statem…
The sample size is too small and will show a large variation. The sample size is too small and can lead to false inferences. A larger sample will give more reliable information.
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the mean score on a statistics exam is 84 points, with a standard devia…
75
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a random sample of 25 seniors were asked what they planned to do immedi…
It is likely that more than half of the students in the senior class plan to attend college.
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describe the shape of the distribution shown in the dot - plot. the dot…
The distribution is approximately symmetric.
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in a population of 1,000 students, 50 were asked by random sampling wha…
540
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find the mean of the ending balance in teresas account for the week. to…
$\$115$
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if the wrong word is used below, change it. if there is no error, click…
James Rhodes didn't mean to meddle in your plans for the homecoming dance.
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a town hosts an arbor day celebration. each of the 105 families attendi…
Ari's because she sampled saplings chosen at different times
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a lawn - care specialist chooses a random sample from the yard and dete…
No, this is not a representative sample because each type of weed should be represented in proportion to the number of weeds actually present in the yard.
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nathan and jordan design surveys to determine the average amount of tim…
Nathan's because his sample was more random
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chelsea wants to determine the number of people in her school who read …
A. Increase the sample size B. Choose students from different grade levels C. Choose every fourth student in all language arts classes
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mikayla designed a survey to determine the number of people expected at…
nonrandom and biased
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a group of tourists is determining the order in which to visit national…
The representative sample contained more adults than children.
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lorie wants to determine the average amount of time that students at he…
C. 2 students from each of the 15 classes
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a bicycle factory installs about 400 tires per day. tires are installed…
The results are likely invalid because it is unlikely that the tires installed in one hour on Monday will represent the entire population of tires.
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sahira chooses a random sample from the library and records the type of…
No, it is not representative because literature books were chosen much more often than the other types.
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inga, kai, and jason volunteer in the school library. they want to find…
Kai
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consider the survey descriptions shown. survey 1: a township employee s…
Survey 3 is most likely to produce a representative sample. Survey 2 is most likely to produce a biased sample. Survey 1 collects information on an entire population.
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diego took a survey to find out how many students plan to go to a schoo…
His sample will probably be biased. His sample will probably be invalid.
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which gives the best definition of a representative sample? o an entire…
A sample that has the same general characteristics of the target population.
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maridel wants to find out how many of her classmates plan to come to th…
Her method will produce a valid sample. Her method will produce a random sample. Her method will produce a representative sample.
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cheryl wants to find the number of hours seventh - graders do homework …
She can randomly survey 50 seventh - graders in the school.
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cough, cough: the following table presents the number of days a sample …
Construct the histogram with frequencies for intervals 12 - 13: 7, 14 - 15: 5, 16 - 17: 7, 18 - 19: 8, 20 - 21: 9, 22 - 23: 0, 24 - 25: 0 as described above.
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introduced in russia after 1917, the system in which a government contr…
Socialism
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2. part b: which language feature provides context for determining the …
A. the way in which "rather" signals a contrast with "State’s elected officials"
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2. part b: which idea referred to in paragraph 4 provides the best cont…
D. the idea that we live in a society in which an individual has a right to express ideas that some other people may find offensive
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1. part a: what is the meaning of the word \permissive\ as used in para…
B. tolerant
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question 6 2 pts in stories like the wizard of oz or the lord of the ri…
Question 6: It shows that completing a quest is meaningless without a journey back to normal life. Question 7: To provide a metaphor for change, death, and rebirth in the human ex…
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from a sample with n = 20, the mean number of pets per household is 3 w…
If the sample size is \(n\), at least \(0.75n\) households have 1 to 5 pets. If we assume \(n = 20\) (since it was mentioned \(n = 20\) in a non - clear part of the problem statem…
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question 4 (1 point) the dot plot displays the lengths of pencils (in i…
6
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question 3 (5 points) the box - plot represents the distribution of spe…
1. 8, slowest, 8 2. 48, fastest, 48 3. 20, Half, 20, half, 20 4. 12, one - fourth, 12, slower 5. 28, one - fourth, at least, 28
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the histogram represents ages of 40 people at a store that sells childr…
C. The interval from 10 to 15 years
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question 1 (1 point) the data set represents the number of eggs produce…
A. 7.6 eggs C. 7.5 eggs E. 8 eggs
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6. the box - plot displays summary data based on the number of tacos so…
115
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the dot - plot shows the batting averages of some baseball players. sel…
A. Bell - shaped, D. Symmetric
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4. the dot - plot shows the batting averages of some baseball players. …
We need to visually analyze the dot - plot. If it has a single peak and is symmetric around the peak, it is bell - shaped. If two distinct peaks, it is bimodal. If more data on on…
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3) what is the difference between a job and a career? (a) a job require…
C. A job is a specific position, while a career is your overall professional path.
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3. describe the shape of the distribution shown in the dot - plot. the …
The distribution is right - skewed.
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unit 1 lesson 5 additional practice problem set. the data set represent…
3
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1. select the correct answer. which flaw in the government created by t…
C. The government was unable to provide for national defense and economic policy.
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the manager at a sports radio station will be covering several football…
$0.1236$
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histograms practice 4. the numbers below indicate the number of summer …
a. Histogram: Bars with heights 3, 3, 4, 7, 0, 0, 0, 0, 1 for intervals \(50 - 65\), \(65 - 80\), \(80 - 95\), \(95 - 110\), \(110 - 125\), \(125 - 140\), \(140 - 155\), \(155 - 1…
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select the correct answer. what is the meaning of the word chivalry? a.…
C. a knightly system of honor
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what does the word tone mean in this sentence? the tone of the poem is …
the attitude of the poem's speaker
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read the sentence. in order to most quickly disseminate the necessary d…
D. spread
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based on context clues, what is the meaning of the word informal in the…
C. friendly and relaxed
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based on context clues, what is the meaning of the word evoke in the se…
B. cause
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why did hitler most likely believe germany had a right to invade other …
The concept of nationalism meant keeping all Germans together.
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5. the box plot displays the resting heart rate, in beats per minute (b…
- What percent of athletes have a resting heart rate above the median? 50% - What percent of athletes have a resting heart rate below the median? 50% - What percent of athletes ha…
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finally, find $q_3$. recall that the third quartile $q_3$ is the median…
37.5
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next, find q1. recall that the first quartile q1 is the median of the l…
18.5
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now, find the median. recall that the median is the central value of an…
33
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first, make a box - and - whisker plot. recall that the five - number s…
The ordered data set is \(11,14,16,17,17,20,21,23,29,32,32,34,35,36,37,38,40,45,45,51\). The lowest value is \(11\) and the highest value is \(51\).
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select the correct answer. what is the meaning of the term carpe diem? …
B. act now while you can
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now, compute $mu - 3sigma$ and $mu + 3sigma$, given that $mu = 350$ and…
329 to 371
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recall that chebyshevs theorem states that for any set of data and for …
$1-\frac{1}{9}=\frac{8}{9}$; 3; 3
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recall that if $mu$ represents the population mean and $sigma$ represen…
$2\%$
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select the correct answer. which sentence best explains the meaning of …
D. The clown emphasizes that time always teaches people to patiently perform good deeds and not expect rewards
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now, compute $\bar{x}-2s$ and $\bar{x} + 2s$, given that $\bar{x}=45$ a…
27 to 63
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recall that chebyshevs theorem states that for any set of data and for …
The blanks should be filled as follows: $\frac{1}{4}$, 75, 2, 2
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evaluating and solving an equation application identify the information…
Finn earns $80$ per vacuum sold. If Finn sells $0$ vacuums, he will still earn a base salary of $340$. If Finn sells $40$ vacuums, he will be paid $3540$. For Finn to earn $5060$,…
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in this problem, we explore the effect on the standard deviation of mul…
(a) \(4.9295\) (b) \(24.6479\) (c) Multiplying each data value by the same constant \(c\) results in the standard deviation being \(|c|\) times as large. (d) No; \(4.64\)
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24. in context, the word \advisories\ (line 83) means travellers weathe…
24. C. warnings 25. C. "Our winter, though, is world class" (line 90)
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what does it mean to paraphrase something? (1 point) to summarize it by…
to summarize it using your own words
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24. in context, the word \advisories\ (line 83) means travellers weathe…
24. C. warnings 25. C. "Our winter, though, is world class" (line 90)
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now use the defining formula for sample standard deviation $s = sqrt{\f…
$2.27$
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22. the choice of imagery in \the loon, the lake, the snow, the cold\ (…
22. outdoors 23. sophisticated
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in order to use the defining formula for sample standard deviation, it …
| $x$ | $\bar{x}$ | $x - \bar{x}$ | $(x - \bar{x})^2$ | |----|----|----|----| | 1 | 4.4 | -3.4 | 11.56 | | 3 | 4.4 | -1.4 | 1.96 | | 5 | 4.4 | 0.6 | 0.36 | | 6 | 4.4 | 1.6 | 2.56 …
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22. the choice of imagery in \the loon, the lake, the snow, the cold\ (…
22. outdoors 23. sophisticated
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recall the defining formula used to compute the sample standard deviati…
$n = 5$, $\bar{x}=4.4$
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what symbol is used for the standard deviation when it is a sample stat…
Sample statistic: s. Population parameter: $\sigma$.
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when computing the standard deviation, does it matter whether the data …
Yes. The formula for $s$ is divided by $n - 1$, while the formula for $\sigma$ is divided by $N$.
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what is the relationship between the variance and the standard deviatio…
The standard deviation is the square root of the variance.
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given $g(x)=\frac{(3x + 5)}{2}$, which of the following shows that crea…
\(y=\frac{1}{3}(2x - 5)\) (corresponding to the second - option in the multiple - choice list)
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astrid feels overwhelmed when she opens her math textbook. which one of…
C. Take notes as you read and review them daily
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a bag with 8 marbles has 2 red marbles, 3 yellow marbles, and 3 blue ma…
$\frac{1}{4}$
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a spinner with 12 equally sized slices has 4 red slices, 3 blue slices,…
$\frac{2}{3}$
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meeting the spending targets in this budget meant some very difficult c…
deciding what would be funded and what would be cut
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a spinner with 10 equally sized slices has 10 yellow slices. the dial i…
$\frac{1}{1}$
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a bag with 8 marbles has 4 red marbles, 3 yellow marbles, and 1 blue ma…
$\frac{1}{2}$
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a major theme of f. scott fitzgeralds work was the idea that the postwa…
D. was empty and meaningless.
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¿cuál es la probabilidad de supervivencia de un car norte de california…
D. 546/600
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10. what percentage of college students have placed a bet on a sporting…
C. Jane because she is taking a smaller sample.
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9. to determine how satisfied patients are with the services they have …
A. a nonsampling error because some patients refused to cooperate by completing the survey.
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when a random sample of first - year college students is surveyed, 38% …
E. The population percentage is very likely to be within 2.8% of the sample percentage.
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7. the alumni association of milpitas high school reports that in a sur…
parameter
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6. six researchers each survey a random sample of 100 customers at a lo…
B. large bias and small variability.