HomaAn education researcher claims that 60% of college students work year-round. In a random sample of 300 college students, 180 say they work year-round. Ala=0.05, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below.O C. Atleast% of college students work year-round.bookOD. The percentage of college students who work year-round is not%.cer ContentsLet p be the population proportion of successes, where a success is a college student who works year-round. State Ho and H. Select the correct choice belowand fill in the answer boxes to complete your choice.(Round to two decimal places as needed.)O A. Ho p#GB. H, p=0.60media LibraryOC. Ho P<Ha p=H p 0.60Ha p2O D. Ho p2OE. Ho P>PlanOF. Ho psH, p<H3 psH p>Tor Success(b) Find the critical value(s) and identify the rejection region(s).sible ResourcesIdentify the critical value(s) for this test.for Success%3D(Round to two decimal places as needed. Use a comma to separate answers as needed.)Clear allCheck answerView an exampleGet more help-Help me solve thisCopyrightO 2021 Pearson Education inc. Allrights reserved. TermS OL Use PIvacy Policy T PermissionS Contact US60°F A OP Type here to search業DG521 AUXXL-BTY10/05/17DelInsertPrtScF12F11

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Answered: an education researcher claims that 60%…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a survey, the sample consisted of 1087 adults who were parents of school-aged children. The sample was selected in a way that makes it reasonable to regard it as representative of the population of parents of school-aged children. One question on the survey asked respondents how much time (in hours) per month they spent volunteering at their children's school during the previous school year. The following summary statistics for time volunteered per month are given below. n = 1087 x = 5.5 median = 1 In USE SALT (a) What does the fact that the mean is so much larger than the median tell you about the distribution of time spent volunteering per month? The fact that the mean is much greater than the median suggests that the distribution of times spent volunteering in the sample was negatively skewed. The fact that the mean is much less than the median suggests that the distribution of times spent volunteering in the sample was positively skewed. The fact that the mean is much greater…
b. What proportion of 8- to 18-year-old Americans tronic devices? In symbols, p(5
d. There is a 30% chance that X is above what value? X= (Type an integer or decimal rounded to two decimal places as needed.)
8) Each of 49 subjects tastes two unmarked cups of coffee and says which he or she prefers. One cup in each pair contains instant coffee, the other fresh-brewed coffee. 30 of the subjects prefer the fresh-brewed coffee. Take p to be the proportion of the population who would prefer fresh-brewed coffee in a blind tasting. Test the claim that a majority of people prefer the taste of fresh-brewed coffee.(a) H0: p = ? and Ha: p > ?(b) What is the test statistic? (Use 2 decimal places)(c) What is the p-value? (Use 4 decimal places)
Members of fraternities and sororities are required to volunteer for community service. Do fraternity brothers work fewer volunteer hours on average than sorority sisters? The data below show the number of volunteer hours worked for thirteen randomly selected fraternity brothers and eleven randomly selected sorority sisters. Brothers: 14 7 11 13 9. 11 8 12 7 13 10 13 Sisters: 13 19 16 11 11 19 5 10 16 17 7 | d. The p-value is ? O a e. Based on this, we should Select an answer the null hypothesis. f. Thus, the final conclusion is that ... The results are statistically significant at a = 0.05, so there is sufficient evidence to conclude that the population mean volunteer hours for fraternity brothers is less than the population mean volunteer work hours for sorority sisters. The results are statistically insignificant at a = 0.05, so there is insufficient evidence to conclude that the population mean volunteer hours for fraternity brothers is less than the population mean volunteer work…
A researcher belleves that 52% of people who grew up as the only child have an IQ score over 100. However, unknown to the researcher, this figure is actually 50%, which is the same as in the general population. To attempt to find evidence for the claim, the researcher is going to take a random sample of 400 people who grew up as the only child. Let p be the proportion of people in the sample with an IQ score above 100. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p. (b) Find the standard deviation of p. (c) Compute an approximation for P(p 20.52), which is the probability that there will be 52% or more people with IQ Scores over 100 in the sample. Round your answer to four decimal places. 2022 acer
It has been claimed that at UCLA at least 40% of the students live on campus. In a random sample of 250 students, 90 were found to live on campus. Does the evidence support the claim at = .01?
Statistics Question
A researcher wishes to determine whether there is a difference in the average age of elementary school, high school, and community college teachers. Teachers are randomly selected from each group. Their ages are recorded below. Test the claim that at least one mean is different from the others. Use α = 0.01.
A B This graph has an r of -0.5. C D
According to an expert for the automotive industry, 68% of Americans know how to drive a manual transmission vehicle. Suppose 220 Americans are sampled. (Give results accurate to at least 4 decimal places.) a. Of the 220 people sampled, 160 respond that they know how to drive a manual transmission vehicle. What is the sample statistic p? p = b. Under the assumption that the industry expert's claim that 68% of Americans know how to drive a manual transmission vehicle is valid, what is the probability that the survey in part (a) would result in a p that is at least as high as the one found? c. Under the assumption that the industry expert's claim that 68% of Americans know how to drive a manual transmission vehicle is valid, what is the probability that the survey in part (a) would result in a p that is between 66% and 71%?
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