Example 134: In a case in Ireland, aclass action lawsuit was broughtagainst the government alleging agediscrimination.The ages of 31randomly selected unsuccessful applicants for promotionyielded a mean age of 47 and a standard deviation of 7.2years. The ages of 30 randomly selected successfulapplicants yielded an average age of 43.9 and a standarddeviation of 5.9 years. Using a 5% significance level, testthe claim that the government is discriminating based onage.

Sample sizes n1=31 , n2=30 Sample means X̄1=47 , X̄2=43.9 s1 =7.2 ,…

Answered: class action lawsuit was brought…

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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Women own an average of 15 pairs of shoes in the Monterrey metropolitan area, according to the National Shoe Chamber. One shoe store believes that newly hired female college graduates have more. For this, the shoe store does a study with 35 women chosen at random and representative of the area and obtains an average of 18.37 pairs of shoes with a standard deviation of 6.12. Is this sufficient evidence that the shoe store was correct at the 0.05 significance level? State the hypotheses, decision rule, conclusion, and your argument.(need the process can be by hand ,Excel or R.) [Answer .. The critical point or boundary value is 16,702….]
The average salary for American college graduates is $45,900. You suspect that the average is different for graduates from your college. The 62 randomly selected graduates from your college had an average salary of $41,473 and a standard deviation of $14,360. What can be concluded at the a = 0.05 level of significance?
A national grocer's magazine reports the typical shopper spends 11 minutes in line waiting to check out. A sample of 21 shoppers at the local Farmer Jack's showed a mean of 10.0 minutes with a standard deviation of 2.2 minutes. Is the waiting time at the local Farmer Jack's less than that reported in the national magazine? Use the 0.050 significance level. a. What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.) Reject 10 p2 11 and fall to reject 11 11 when the test statistic is b. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
Do political sclence classes require more writing than history classes? The 57 randornly selected political science classes assigned an average of 17.8 pages of essay writing for the course. The standard deviation for these 57 classes was 4 pages. The 58 randomly selected history classes assigned an average of 16.8 pages of essay writing for the course. The standard devlation for these 58 classes was 5.6 pages. What can be concluded at the a = 0.10 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answerv Select an answerv Select an answerv H: Select an answerv Select an answerv Select an answerv b. The test statistic ?v = (please show your answer to 3 decimal places.) c. The p-value = d. The p-value is ?v a e. Based on this, we should Select an answerv the null hypothesis. f. Thus, the final conclusion is that ... (Please show your answer to 4 decimal places.) O The results are statistically significant…
A . please do not uplod handwritting image ( only typing please)
According the the U.S. Department of Education, full-time graduate students receive an average salary of $15,000 with a standard deviation of $1,200. The dean of graduate studies at a large state university in PA claims that his graduate students earn more than this. He surveys 100 randomly selected students and finds their average salary is $16,000. Use a significance level of 0.05 to test if there is evidence that the dean's claim is correct. What is the Z crit?
2) In a test of the Atkins weight loss program, forty individuals participated in a randomized trial with overweight adults. After one year, the mean weight loss was 7.1 pounds with a standard deviation of 4.8 pounds. Test a claim that, on average, participants lose 5 pounds. Use a .05 level of significance.
A food company claims that their packets of chips have an average weight of 50g. A consumer advocacy group takes a random sample of 25 packets and finds that the average weight is 49.8g with a standard deviation of 0.9g. Can the consumer advocacy group reject the claim of the food company at a significance level of 0.05?
Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the hospital. Do patients at rural hospitals have a different waiting time? The 12 randomly selected patients who went to the emergency room at rural hospitals waited an average of 3.9 hours to be admitted into the hospital. The standard deviation for these 12 patients was 2.2 hours. What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho:2 Select an answer H: Select an answer C. The test statistic ? v (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimnal places.) e. The p-value is ? Based on this, we should Select an answer the null hypothesis. 2. Thus, the final conclusion is that The data suggest the population mean is not significantly different from 5 at a = 0.10, so there is statistically insignificant…

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