
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A researcher conducts a hypothesis test to evaluate the effect of a treatment. The hypothesis test produces a z-score of z = 2.37. Assuming that the researcher is using a two-tailed test, what decision should be made?
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- A USA Today article claims that the proportion of people who believe global warming is a serious issue is 0.63, but given the number of people you've talked to about this same issue, you believe it is less than 0.63. The hypotheses for this test are Null Hypothesis: p ≥ 0.63, Alternative Hypothesis: p < 0.63. If you randomly sample 20 people and 12 of them believe that global warming is a serious issue, what is your test statistic and p-value? Question 3 options: 1) Test Statistic: 0.278, P-Value: 0.391 2) Test Statistic: 0.278, P-Value: 0.609 3) Test Statistic: -0.278, P-Value: 0.782 4) Test Statistic: -0.278, P-Value: 0.391 5) Test Statistic: -0.278, P-Value: 0.609arrow_forwardA local teacher wants to see if teaching writing in different ways impacts student learning. She has two classes of similar characteristics. In one class, she will use Teaching Strategy A and in the other class she will use Teaching Strategy B. She ran her analysis in Microsoft Excel and received the following output table. If the P value is less than 0.05, the null hypothesis may be rejected. Based on the data table, what decision should the teacher make about the hypothesis?arrow_forwardPast studies have indicated that 85.6% of all enrolled college students in the U.S are undergraduates. A random sample of 500 enrolled college students in a particular stat revealed that 420 of the students were undergraduates. Is there enough evidence to conclude that the percentage of undergraduates from this particular state differs from the national percentage? A. What type of test would be appropriate for this situation? (Name the test and indicate if it should be a one tailed test or a two tailed test) B. State the Null and the alternate hypothesis. C. Perform the appropriate test and report the P- Value. D. Use your P-Value to make a conclusion about the problem. Are you accepting or rejecting the null hypothesis?arrow_forward
- An ANOVA test is conducted of the grades earned by students from a math professor, who taught 3 sections of the same class: morning, afternoon and evening. The decision was to Reject the null hypothesis. Does the test tell which mean is significantly different? yes O noarrow_forwardHelp me!!arrow_forwardThe smaller the observed p-value, the more evidence you have against the null hypothesis. Select one: True Falsearrow_forward
- It is hypothesized that there is a difference in job satisfaction between those who receive regular feedback on their job performance and those who receive irregular feedback." is an example of which type of hypothesis? a. Directional hypothesis b. Not a hypothesis c. Null hypothesis d. Non-directional hypothesisarrow_forwardAccording to the Minnesota Baccalaureate Psychomotor Skills Test (2008) your patient has significantly greater psychomotor skills than the average patient. Which of the following results would be appropriate to see with this finding? a-Z=1.36 (p=0.01) b-Z=5.67(p=0.08) c-Fail to reject the null d-Z= -1.98 (p=0.02) why is the answer a? and what is a trick to remember with p values? i understand that it is 0.05 or 5% chance of errorarrow_forwardUsing image attached A. Fill in blanks B. What are the null and alternative hypothesis? C. Find the test statistic, z0 D. Find the P-Valuearrow_forward
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