Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
-
review the passage. the simile is shown in bold. the next morning she w…
It contributes to a feeling of excitement.
-
review the passage. the simile is shown in bold. the next morning she w…
Neither of the provided options is correct. The simile creates a warm and inviting tone rather than excitement or suggesting greed.
-
review the passage. the metaphor is shown in bold. tuck twitched and th…
It helps the reader visualize May's physical appearance.
-
students from grover middle school are recycling aluminum cans. the tab…
Range: 36 Mode: 42 Median: 30 Mean: 28.73
-
one factor determining the number of representatives for a given congre…
B. population
-
which sentence contains an example clue, a type of context clue to help…
Her frugal lifestyle of clipping coupons and waiting for sales helped her to live better with a minimum wage job.
-
low temperatures for 5 days this week and last week are shown in the ta…
- the range of last week's temperatures - the mean of last week's temperatures (since \(8>5\)) - the mean of this week's temperatures (since \(7>5\))
-
review the passage. the hyperbole is shown in bold. now i stared out th…
It creates a sense of abundance.
-
elias likes to read during his summer breaks. the table below shows the…
The modes differ by 40, but the ranges differ by 40.
-
polinas math scores are shown in the table. what is the mean absolute d…
8.8
-
darius and barb are playing a video game in which the higher score wins…
Barb is correct if both the mean and median scores are considered.
-
high temperatures for this week and last week last week (°f) this week …
5 degrees
-
joaquin and trisha are playing a game in which the lower median wins th…
Joaquin won because the median of his scores is 73.5 and the median of Trisha's scores is 83.
-
tyrell recorded his science scores and his math scores. the measures of…
There is more variation in the science scores.
-
georgina likes to read during her summer break. the table below shows t…
The books she read last summer had more pages, on average, than the books she read this summer.
-
27. for a normally distributed dataset with a mean of 100 and a standar…
C. 87.2
-
25. a person delivers packages in a downtown business several times eac…
b. 21.4
-
25. why is it often impractical to measure an entire population? a. bec…
C. Because it is time - consuming and expensive
-
finding the ratio of the difference in means to the mad what is the app…
31
-
24. a survey of 150 households finds that 45% of respondents recycle re…
C. 7.96%
-
23. a sample of 40 students has a mean score of 80 and a standard devia…
b. Yes, the data is consistent
-
a sample of 120 employees shows that 72 prefer remote work. based on th…
There is no correct option provided in the given choices as the calculated proportion is 0.6.
-
13. a sample of 120 employees shows that 12 prefer remote work. based o…
The proportion is 0.08. Since the options are not clearly visible, if one of the options is 0.08, that would be the correct answer.
-
21. how do simulation models help in statistical analysis? a. by analyz…
A. By analyzing variability in sample estimates
-
20. a study finds that the mean score on a test for a sample of 64 stud…
C. 1.50 points
-
analyzing mean absolute deviations robins scores: 99, 108, 102, 107, 11…
The mean absolute deviation (MAD) is a measure of the average distance between each data point in a set and the mean of that set. For Robin and Evelyn, it shows how spread - out t…
-
finding the mean absolute deviation evelyns scores distance from the me…
5.6
-
read the examples of how someone might feel after moving to a new place…
1. overcoming language barriers 2. adjusting to differences in appearance 3. succeeding in school 4. learning about government and laws 5. understanding values and beliefs
-
question 8, 3.4.28 - be part 4 of 5 the postage charged for first - cla…
$P(2)=89$ and $P(2.01)=89.24$
-
finding distances from the mean the mean of evelyns scores was 138. com…
$x=-13$ $y=-1$ $z = 7$
-
finding the mean absolute deviation what is the mean absolute deviation…
$5.2$
-
the postage charged for first - class mail is a function of its weight.…
$0 < x\leq4$
-
finding distances from the mean the mean of robins scores was 107. comp…
\(x = 5\) \(y = 0\) \(z = 12\)
-
19. what does the symbol $hat{p}$ represent in statistics? a. the sampl…
A. The sample proportion
-
17. in a study of 200 customers, the average spending was $150 with a s…
a. No, the data is inconsistent
-
16. what is the primary advantage of stratified sampling? a. it elimina…
C. It ensures proportional representation from all subgroups
-
robins scores: 99, 108, 102, 107, 119. evelyns scores: 125, 137, 138, 1…
Robin is not winning as Evelyn's median score (138) is higher than Robin's median score (107).
-
(1) i am writing to you today to try and con. vince you to provide a di…
B. split it into two sentences
-
16. a school wants to estimate the average number of hours students sle…
C. 0.25
-
(a) (1) i am writing to you today to try and con. vince you to provide …
C. Similarly, head injuries
-
14. a dataset has $mu = 70$ and $sigma = 10$. what is the z - score for…
d. 2
-
(1) i am writing to you today to try and con. vince you to provide a di…
C. While knees
-
13. why is random sampling important in statistics? a. to simplify calc…
B. To reduce bias and ensure a representative sample
-
(a) (1) i am writing to you today to try and con. vince you to provide …
C. change are to is
-
12. what does consistency in sampling refer to? a. the method of collec…
D. The degree to which repeated estimates show similar results
-
(1) i am writing to you today to try and con. vince you to provide a di…
C. change California and new Jersey, to California and New Jersey,
-
11. which of the following situations would most likely result in an un…
B. A small sample with a single extremely large value
-
use the range and the mean to find the missing numbers in each ordered …
18. 27, 38 19. 62, 77
-
(a) (1) i am writing to you today to try and con. vince you to provide …
B. try to convince
-
which excerpt from the scarlet ibis most foreshadows that the narrator …
There is within me (and with sadness I have watched it in others) a knot of cruelty borne by the stream of love, much as our blood sometimes bears the seed of our destruction, and…
-
10. a sample of 50 employees shows an average monthly commute - time of…
C. 1.82 minutes
-
9. which statistical measure is often calculated by dividing the area u…
a. Median
-
robin and evelyn are playing a target game. the object of the game is t…
138
-
7. which sampling method divides a population into subgroups and select…
B. Stratified sampling
-
6. a random sample of 150 adults finds that 72% favor a new policy. cal…
B. 0.037
-
4. what is the meaning of dress me in borrowd robes as it appears in th…
A. call me by a title that isn't mine
-
3. which of these quotes most accurately explains the meaning of the fo…
C. "Your sons will become kings, but you won't."
-
5. in statistics, what is the mean of a sample? a. the value that occur…
C. The sum of the data points divided by the number of points
-
4. what does the margin of error directly account for in a statistical …
c. Sampling variability
-
3. a margin of error of ±0.25 is calculated for a survey result of p = …
A. 0.15 to 0.65
-
2. a data point at the 75th percentile corresponds to what cumulative p…
B. 0.75
-
1. a person logs the number of cups of coffee consumed each day during …
c. 0.43
-
16. factor. 9a² - 16 18. what does it mean when (x³ + 2x² - 12x - 24)÷(…
$(3a + 4)(3a-4)$ ### 18. What does it mean when $(x^{3}+2x^{2}-12x - 24)\div(x + 2)$ has a remainder of zero?
-
kaylee owns a small business selling clothing. she knows that in the la…
$0.30$
-
question a spinner is divided into five colored sections that are not o…
$\frac{7}{46}$
-
at that moment the bird began to flutter, but the wings were uncoordina…
What symbol does this passage describe? A bird What is the literal meaning of this symbol? A bird
-
question 6 of 10 what does it mean for a supreme court decision to serv…
D. Other courts use the decision as a guideline when they rule on similar cases.
-
what is the meaning of the word \arduous\ as used in the following sent…
A. burdensome
-
6. what does proctor mean when he says, society will not be a bag to sw…
Proctor means Mr. Putnam can't manipulate society for his own ends.
-
un cubo numérico con caras enumeradas del 1 al 6 será lanzado una vez. …
Espacio muestral: $\{1, 2, 3, 4, 5, 6\}$ Suceso de obtener un número menor que 5: $\{1, 2, 3, 4\}$
-
question 11 researchers question whether college students choice of dec…
A. Chi - squared test for independence
-
question 9 a health researcher was interested in finding out whether th…
D. Matched pairs t - test
-
question 8 suppose a classroom teacher wants to measure whether offerin…
B. Matched pairs
-
a physical therapy researcher was interested in determining the impact …
B. Matched pairs t - test
-
academic vocabulary: sentence completion directions: select a vocabular…
reveal
-
question 6 advertising researchers claim that the power of curiosity ca…
E. ANOVA
-
a researcher wants to explore the relationship between two variables: t…
B. Matched pairs
-
question 4 we want to explore the difference between salary (in dollars…
E. Inference for regression
-
question 3 we want to explore the relationship between the prices of di…
D. Inference for regression
-
question 2 a chemistry professor suspects that there is a relationship …
B. Inference for regression
-
question 1 an athletic trainer wants to find out if there is a signific…
E. Two - sample t - test
-
in a 2012 report from the u.s. department of education breaking down th…
A. 0.24
-
to determine if there is a relationship between grade performance and e…
C. Extracurricular participation and grade performance are independent. D. The null hypothesis of the chi - squared test for independence in this case is true.
-
question 4 to determine if there is a relationship between grade perfor…
C. 5.86
-
rainfall and corn crop yield reported for the 38 years from 1890 throug…
B. The data do not provide sufficient evidence to conclude that crop yield is linearly related to rainfall.
-
rainfall and corn crop yield reported for the 38 years from 1890 throug…
B. Rainfall seems to have a positive effect on the yield of corn.
-
question 7 do tv viewers differ, on average, in terms of the amount of …
B. Paired t - test
-
directions: select a vocabulary term from the box to complete the sente…
1. reveal 2. conflict 3. voluntary 4. investigate 5. accurate 6. seek 7. create
-
question 6 a gre course prep company advertises that its course can sig…
A. Paired t - test
-
question 5 using four methods to teach anova, do these four samples dif…
A. The data provide strong evidence that the four mean scores (representing the four teaching strategies) are not all equal.
-
question 4 using four methods to teach anova, do these four samples dif…
B. No, since 0.793/0.360 > 2
-
question 3 as first year residential students get familiar with campus …
A. Paired t - test and CI: Sept; Dec
-
a study measuring fitness level in teens randomly sampled 112 male teen…
D. The data do not provide sufficient evidence to conclude that the mean fitness score of male teens is higher than that of female teens.
-
question 1 a canadian study measuring depression level in teens (as rep…
C. $H_0:\mu_1=\mu_2$, $H_a:\mu_1>\mu_2$ D. $H_0:\mu_1 - \mu_2=0$, $H_a:\mu_1-\mu_2>0$
-
question 4 a management consultant was interested in whether workers wh…
C. The F statistic will be relatively small, so it is likely that the researcher can conclude that the population means may be equal.
-
a medical school admissions officer was interested in whether there is …
C. Reject $H_0$ and conclude that the data provide strong evidence that there is a relationship between the student's major and MCAT score.
-
ex. in a large population, 68% of the people have been vaccinated. if 4…
$0.98951424$
-
a medical school admissions officer was interested in whether there is …
A. $H_0:\mu_1 = \mu_2=\mu_3$; $H_a:\mu_1,\mu_2,\mu_3$ are not all equal
-
question 1 a medical school admissions officer was interested in whethe…
B. Yes, because 6.17/4.78 < 2.
-
research suggests that the pressure of being timed may interfere with p…
D. The data provide sufficient evidence to reject $H_0$. Thus, the researchers conclude that sixth - grade students get, on average, fewer correct answers and thus lower scores on…