According to a Pew Research Center poll conducted last year, 63% of American adults say that young adultsshould be financially independent by age 22.A social scientist would like to test this claim. She found that 242 out of a random sample of 401 Americanadults said that young adults should be financially independent by age 22.Calculate the test statistic for the following set of hypotheses.Ho:p0.63H P> 0.63O1.10O-1.10O-1.04O-1.99> Next Question

According to the given information, we have H0: p=0.63H1: p>0.63

Answered: According to a Pew Research Center poll…

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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Four scenarios of statistical studies are given below. Decide which study uses a population parameter. Answer O Lakeside Family Dentistry reported that 6 of the 15 patients who came in for a regular cleaning one day had at least one cavity. O As part of her senior project, Kaisa asked 84 of her classmates if they voted in the last presidential election. 39 said yes. O of 351 dog owners who were surveyed, 70 reported owning two dogs. The average finish time for the Ironman, Kona was 11:32 for the 1883 finishers, with an average swim time of 1:14, an average bike time time of 4:14.
Internet tax: The Gallup Poll asked 1043 U.S. adults whether they believed that people should pay sales tax on items purchased over the internet. Of these, 407 said they supported such a tax. Does the survey provide convincing evidence that the percentage of U.S. adults who favor an internet sales tax differs from 40%? Use the a = 0.05 level of significance. Part 1 of 5 State the appropriate null and alternate hypotheses. Ho: p = 0.40 H:p = 0.40 This hypothesis test is a two-tailed test. Part: 1/5 Part 2 of 5 Find the critical values. Round the answers to at least three decimal places. For a = 0.05, the critical values are and
According to a recent report (based on historical data), 47% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 59 had unpaid internships. Follow the five-step p-value approach to hypothesis testing (see Chapter 9 Powerpoint slides #53 - 59 or e-text p. 339 - 340. Use a 0.10 level of significance to determine whether the proportion of college interns that had unpaid internships is different from 0.47. Part 1 Let π be the population proportion. Determine the null hypothesis, H0, and the alternative hypothesis, H1.(Type integers or decimals. Do not round.) A. H0 : μ = 0.47; H1 : μ ≠ 0.47 , because μ is always used in hypothesis testing B. H0 : π = 0.47; H1 : π ≠ 0.47, because the two hypotheses always use a known or likely to be true value for the population proportion C. H0 : π = 0.59; H1 : π ≠ 0.59, since we are trying to prove the sample proportion of 59100= 0.59 is really true D. H0 : π ≠…
Stay safe and healthy. Exercise: Apply the procedure in testing the hypothesis. A survey was conducted at a community college of 102 randomly selected students who dropped a course in the current semester to learn why students drop courses. Personal drop reasons include financial, transportation, family issues, health issues, and lack of child care. Course drop reasons include reducing ones load, being unprepared for the course, the course was not what was expected, dissatisfaction with teaching, and not getting the desired grade. Work drop reasons include an increase in hours, a change in shift, and obtaining full-time employment. Test whether gender is independent of drop reason at the 1% level of significance. Use "Data_Example and Exercises file". SLIDESMANIA.COM Dec 8, 2021 (Edited Dec 8, 2021) Result ACTUAL/OBSERVED Count of Drop Reason Column Labels - Career Row Labels Course Institution Personal Work Grand Total Female 10 12 18 6 11 57 Male 11 9 6 12 46 Grand Total 21 21 26 12…
A news article that you read stated that 59% of voters prefer the Democratic candidate. You think that the actual percent is different. 120 of the 236 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?Select an answerv (please enter a decimal) H.:?Select an answerv (Please enter a decimal) c. The test statistic ?V = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ?va f. Based on this, we should Select an answerv the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population proportion is not significantly different 59% at a = 0.05, so there is not sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is different 59%. O The data suggest the…
A publisher reports that 44% of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 260 found that 40% of the readers owned a particular make of car. State the null and alternative hypotheses.
The article "Freedom of What?" (Associated Press, February 1, 2005) described a study in which high school students and high school teachers were asked whether they agreed with the following statement: "Students should be allowed to report controversial issues in their student newspapers without the approval of school authorities." Researchers hypothesized that the long-run proportion of high school teachers who would agree with the statement would differ from the long-run proportion of high school students who would agree. Two random samples - 8,000 high school teachers and 10,000 high school students were selected from high schools in the U.S. It was reported that 39% of the teachers surveyed and 58% of the students surveyed agreed with the statement. A simulated null distribution of 1,000 differences in proportions created by using the Two Proportion applet is shown below. Total shuffles - 1000 251 Number of shuffles 20 Mean -0.000 SD-0.007 LUL 0.024 -0.026 -0,016 -0.006 0.004 0.014…
If the level of significance in a hypothesis test is 1 %, what would the p-value have to be for failing to reject the null hypothesis? a. equal to 0.005 b. less than .01 c. greater than .01
Find test value and p-score.
According to the 2010 Census, 16% of people in the United States are of Hispanic or Latino origin. One Vigo County supervisor believes her county has a lower proportion of Hispanic people than the nation as a whole and questions the validity of the Census. She looks at the county's most recent survey data, a random sample of 400 county residents, and found that 44 of those surveyed are of Hispanic or Latino origin. a. Identify an appropriate null and alternative hypothesis for a test to be conducted by the county supervisor. b. Would the hypothesis test be one or two tailed? Z or T test? Upper or lower? Explain your response.
Country Magazine reports that celebrity MySpace accounts have an average of 4 million friends. Celebologist Chuck Norris thinks that it's actually different than that. Norris randomly samples 43 celebrities on MySpace and finds an average of 3 million friends. Which is the best set of hypotheses to test Chuck Norris's claim?
Classify the hypothesis test as two-tailed, left-tailed, or right-tailed. At one school, the average amount of time that tenth-graders spend watching television each week is 20.1 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine whether the average amount of time spent watching television per week has decreased from the previous mean of 20.1 hours.

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