ExercisesIn each of the following exercises, use the ten-step hypothesis testing procedure. For eachexercise, as appropriate, explain why you chose a one-sided test or a two-sided test. Discuss howyou think researchers or clinicians might use the results of your hypothesis test. What clinical orresearch decisions or actions do you think would be appropriate in light of the results of yourtest?Ho et al. (A-22) used telephone interviews of randomly selected respondents in HongKong to obtain information regarding individuals' perceptions of health and smokinghistory. Among 1222 current male smokers, 72 reported that they had "poor" or "verypoor" health, while 30 among 282 former male smokers reported that they had "poor"or "very poor" health. Is this sufficient evidence to allow one to conclude that among Hong Kong men there is a difference between current and former smokers with respectto the proportion who perceive themselves as having "poor" and "very poor" health?Let a = .01.

The z test are used to test the significance between the sample and the population. It is used when…

Answered: In each of the following exercises, use…

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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It is claimed that only 5% of professional golfers are left-handed. Believing this claimed value is incorrect, a researcher surveys a large random sample of professional golfers and finds that the percentage who are left-handed is 3%. When a hypothesis test is conducted at a significance (or alpha) level of 0.01, the p-value is found to be 0.02. What decision should the researcher make based on the results of the hypothesis test? A. The null hypothesis should be rejected because 0.02 is less than 0.05. B. The null hypothesis should be rejected because 0.02 is less than 0.03. C. The null hypothesis should be rejected because 0.02 is greater than 0.01. D. The null hypothesis should be rejected because 0.03 is greater than 0.01. E. The null hypothesis should not be rejected.
In an experiment to study the relationship between hypertension (high blood pressure) and smoking status the following data was collected on a random sample of 180 smokers. a. Is this a Purposive or a Naturalistic study? b. State the appropriate hypotheses and test. State your conclusion. Smoking Status Light Smoker Moderate Smoker Heavy Smoker 16 Low 30 10 Blood Medium 27 20 14 Pressure High 24 18 21
Food inspectors inspect samples of food products to see if they are safe. This can be thought of as a hypothesis test where Ho: the food is safe, and H1: the food is not safe. If you are a consumer, which type of error would be the worst one for the inspector to make, the type I or type Il error?
According to the most recent General Social Survey, 70% of adults watch TV nightly. A researcher believes that the proportion of college students who watch TV nightly is less than this. To test this claim the research samples 400 college students and finds that 276 watch TV nightly. At the 0.05 level of significance does this data provide evidence to suggest that the proportion of college students who watch TV nightly is less than 70%? Select the correct conclusion for the hypothesis test: Question 12 options: Fail to reject the null hypothesis because the p-value is less than the level of significance. Fail to reject the null hypothesis because the p-value is greater than the level of significance. Reject the null hypothesis because the p-value is less than the level of significance. Reject the null because the p-value is greater than the level of significance.
Suppose that you are to conduct the following hypothesis test: Ho: p 20.53 H: P < 0.53 A sample of size 145 yielded a sample proportion of 0.4463. Determine each of the following: A. The value of the test statistic: B. The p-value is approximately
A health provider saw that 48% of their members received their flu shot in recent years. The health care provider tried a new advertising strategy the following year, and they took a sample of members to test if the proportion who received their flu shot had changed. Determine the null and alternative hypothesis
In 1948, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you on occasion consume, alcoholic beverages?" Of the 1100 adults surveyed, 429 indicated that they were total abstainers. In a recent survey, the same question was asked of 1100 adults and 363 indicated that they were total abstainers. Determine the P-value for this hypothesis test.
An academic tutor wants to assess whether her remedial tutoring has been effective for her five students. Using a pre-post design, she records the following grades for a group of students prior to and after receiving her tutoring. Using an alpha of .05 and a two-tailed test complete all 4 steps of hypothesis testing to see if the remedial tutoring was effective. Before 2.4 After 3.0 2.5 2.8 3.0 3.5 2.9 3.1 2.7 3.5 M= 2.7 M=3.8
Create a research hypothesis that would be answered using either a z- or a t- test. Include the following: Introduction: Brief description of the study including the purpose and importance of the research question being asked. What is the null hypothesis? What is the research hypothesis? Participants/Sampling Method: Describe your sampling method. What is your sample size? Who is your population of interest? How representative is the sample of the population under study? Data Analysis: Describe the statistical analysis. What is your variable? What is its level of measurement? What is your alpha level? Results & Discussion: Did you reject the null hypothesis? What information did you use to lead you to your conclusion? Was your p value greater than or less than your alpha? NOTE: You can just make up numbers, but include your made-up p value
What is the alternative hypothesis? And what would be the appropriate decision/conclusion?
Consider the hypothesis test below. The following results are for independent samples taken from the two populations. Sample 1 Sample 2 n1=200 n2=300 pbar1=.25 pbar2=.17 Use pooled estimator of p.a. What is the value of the test statistic (to 2 decimals)?b. What is the p-value (to 4 decimals)?c. With a=.05 , what is your hypothesis testing conclusion?- Select your answer - Conclude the difference between the proportions is greater than 0 Cannot conclude the difference between the proportions is greater than 0 Icon Key Question 7 of 10 Exercise 10.29 (Self-Test) Algorithmic

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