In a psychology experiment 130 students were classified by major (sciences or humanities) and if they are right or left-handed. Do these data show sufficient evidence of association between choice of major and right/left handedness? Apply each of : a. X? b. G? c. Fisher's exact test State clearly in each case, the null and alternative hypotheses and your conclusions. Compare the three test procedures.

In a psychology experiment 130 students were classified by major (sciences or humanities) and if they are right or left-handed. Do these data show sufficient evidence of association between choice of major and right/left handedness? Apply each of : a. X? b. G? c. Fisher's exact test State clearly in each case, the null and alternative hypotheses and your conclusions. Compare the three test procedures.

Name: 15. In a psychology experiment 130 students were classified by major
Uploaded: 2024-03-20T07:06:41.000Z
Channel: Bartleby
Description: 15. In a psychology experiment 130 students were classified by major (sciences orhumanities) and if they are right or left-handed. Do these data show sufficientevidence of association between choice of major and right/left handedness? Applyeach of :

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Only 26% of psychology majors are satisfied with their career paths as compared to 50% of accounting majors (The Wall Street Journal, October 11, 2010). Suppose these results were obtained from a survey of 300 psychology majors and 350 accounting majors.Let p1 represent the population proportion of satisfied accounting majors and p2 the population proportion of satisfied psychology majors. a. Develop the appropriate null and alternative hypotheses to test whether the proportion of accounting majors satisfied with their career paths differs from psychology majors by more than 20 percentage points. multiple choice 1 H0: p1 − p2 = 0.20; HA: p1 − p2 ≠ 0.20 H0: p1 − p2 ≤ 0.20; HA: p1 − p2 > 0.20 H0: p1 − p2 ≥ 0.20; HA: p1 − p2 < 0.20 b. Calculate the value of the test statistic. (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) c. Find the p-value. multiple choice 2 p-value < 0.01 0.01 ≤…
3.) In a particular epidemic disease, 400 individuals were surveyed by a well-established pharmaceutical company to determine if the company’s new vaccine was effective after 4 months. Among the 120 individuals who had that disease and were given the shot, 29 were cured and achieved immunity after 4 months. Among 280 individuals who had the disease but were not given the shot, 56 were cured and achieved immunity after 4 months. Is there enough statistical evidence to support the company’s claim of the effectiveness of the vaccine?
Suppose a consumer group suspects that the proportion of households that have three or more cell phones is 0.37. A cell phone company has reason to believe that the proportion is not 0.37. Before they start a big advertising campaign, they conduct a hypothesis test. Their marketing people survey 103 households with the result that 82 of the households have three or more cell phones. What is the test statistics to test the Null hypothesis H0 : p = 0.37 against the alternative, Ha : p ≠ 0.37?
According to a poll result by Gallup Institute published on June 22, 2021 says, “Solid majority of Americans,56%, approve of job Biden is doing as president,” and, “Congress’ approval slips five points to 26%, lowestsince January.” These results are based on, “telephone interviews conducted June 1~18, 2021, with arandom sample of 1,012 adults, aged 18 and older, living in all 50 U.S. states and the District of Columbia.”Answer the problems using the theory of simple random sampling.◼ 2.1. Explain why the normal distribution (z-distribution) is appropriate for the inferential analyses in this case. ◼ 2.2. Estimate the 98% confidence interval for the president’s approval rate◼ 2.3. Estimate the 95% lower confidence bound for the congress’ approval rate
A researcher wants to determine if a new advertising campaign improves the amount of time kids spend reading compared to the general population. If she rejects the null hypothesis, she has decided that the advertising campaign _____________ and that her sample of kids _____________. improves reading; is different from the general population doesn’t improve reading; is different from the general population improves reading; is the same as the general population doesn’t improve reading; is the same as the general population
A researcher selects a sample of 20 participants and makes the decision to fail to reject the null hypothesis. She conducts the same study testing the same hypothesis with a sample of 100 participants and makes the decision to reject the null hypothesis. Give a likely explanation for why the two samples led to different decisions.
The National Institute of Mental Health published an article stating that in any one-year period, approximately 8.8% of American adults suffer from depression or a depressive illness. Suppose that in a survey of 2000 people in a certain city, 11.3% of them suffered from depression or a depressive illness. Conduct a hypothesis test to determine if the true proportion of people in that city suffering from depression or a depressive illness is more than the 8.8% in the general adult American population. Test the relevant hypotheses using a 5% level of significance. Give answer to at least 4 decimal places. a. What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.) H0: H1: b. Based on the hypotheses, find the following: c. Test Statistic = d. p-value = e. Based on the above we choose to:_____________ f. The correct summary would be: ____________ that the true proportion of people in that city suffering from depression or a…
The National Institute of Mental Health published an article stating that in any one-year period, approximately 8.8% of American adults suffer from depression or a depressive illness. Suppose that in a survey of 2000 people in a certain city, 11.3% of them suffered from depression or a depressive illness. Conduct a hypothesis test to determine if the true proportion of people in that city suffering from depression or a depressive illness is more than the 8.8% in the general adult American population. Test the relevant hypotheses using a 5% level of significance. Give answer to at least 4 decimal places. a. What are the correct hypotheses? H0: H1: b.) Based on the hypotheses, find the following: c.) Test Statistic = d.) p-value = e.) Based on the above we choose to________________ f.) The correct summary would be:____________ that the true proportion of people in that city suffering from depression or a depressive illness is more than the percent in the general…
A statistician selects a sample of 20 participants and makes the decision to retain the null hypothesis. He conducts the same study testing the same hypothesis with a sample of 100 participants and makes the decision to reject the null hypothesis. Provide a likely explanation for why the two samples led to different decisions.
A 25-year old study of randomly selected 6000 adults from the United Kingdom noted four bad habits: 1)Smoking, 2) Drinking, 3) Lack of Exercise and 4) Poor Diet. The study looked to show that there is a higher death rate (proportion who die in the 25-year period) among people with all four bad habits than amongst people with none of the bad habits. a) Was this an experiment or observational study. Explain. b) State the Null and Alternative hypotheses. c) What would be the result of a TYPE I ERROR. d) What would be the result of a TYPE II ERROR. Out of the 6000 people, 314 had all four bad habits and 91 died during the study. While 387 people had none of the bad habits, 32 died during the course of the study. Does this provide sufficient evidence that there are different mortality rate between the two groups? e) Calculate and interpret the test statistic and p-value in context of this study. Be sure to check all necessary conditions and name your test.
Mr. Juan Rafael, the manager of JJ Computer Tech is conducting a study on the number of customers who pay by personal check, by credit card and by debit card. During the course of five days, he records the following number of purchases made by each method. What should be the conclusion as a result of the analysis? A. The number of customers who pay by personal check, by credit card, and by debit card at JJ Computer Tech are the same.B. At least two of the methods of payment in purchasing at JJ Computer Tech are significantly different.C. There is a significant difference in the number of customers who pay by personal check, by credit card, and by debit card at JJ Computer Tech.D. There is no significant difference in the number of customers who pay by personal check, by credit card, and by debit card at JJ Computer Tech
According to the U.S. Bureau of Labor Statistics, approximately equal numbers of men and women are engaged in sales and related occupations. Although that may be true for total numbers, perhaps the proportions differ by industry. A random sample of 110 salespersons from the industrial sector indicated that 54 were men, and in the medical supply sector, 40 of 100 were men. One wants to see if the proportion of men in industrial sales differs from the proportion of men in medical supply sales. a) Formulate the null and the alternative hypotheses and test them at α = 0.05. b) Find the test p-value and confirm the result obtained in part a). c) Can it be effectively inferred that the proportion of men in industrial sales is different from the proportion of men in medical supply sales? Explain.