A researcher calculates that his experiment had a power of .65. What does this mean? A.There is a 65% chance of correctly rejecting the H0 assuming the H1 is true B.There is a 65% chance of incorrectly rejecting the H0 assuming the H0 is true C.There is a 65% chance of incorrectly retaining the H0 assuming the H1 is true D.There is a 65% chance of correctly retaining the H0 assuming the H0 is true

Answered: A researcher calculates that his…

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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Given that μ is $350 and σ is $150 calculate the z-score of 343.31 and then find the likelihood that a random sample of 2597 adult American shoppers would spend $343.31 or less on Christmas. Now assume that μ is $340 and that σ remains $150. Find the likelihood that in this case, a random sample of 2597 adult American shoppers would spend $342.31 or more on Christmas.
1.18 Cats on YouTube. Suppose you want to estimate the percentage of videos on YouTube that are cat videos. It is impossible for you to watch all videos on YouTube so you use a random video picker to select 1000 videos for you. You find that 2% of these videos are cat videos. Determine which of the following is an observation, a variable, a sample statistic (value calculated based on the observed sample), or a population parameter
Answer the letter D only
A null hypothesis is that the average blood pressure for adult is 70. For a sample of 60 adults, the average blood pressure is 71.8. A significance test is done, and the p-value is 0.20 what is the most appropriate conclusion? A. Reject the hypothesis that the population averages 70 B. Fail to reject the hypothesis that the population averages 70 O C. Reject all hypothesis that the sample average is 70 D. None of these. E. Conclude that the population average is 71.8
Express the alternative hypothesis in symbolic form. A psychologist claims that the mean amount of time (in hours) that females spend in talk therapy is more than that of men. Assume that two samples are independent. Let the female talk therapy times be the first population and the male talk therapy times be the second population.
The next six questions refer to the following scenario: A random sample of 25 students were asked to self-identify as "statistics-lovers" or "statistics-adorers." 16 students self-identified as "lovers" and 9 students as "adorers." Below table summarizes the mean of a statistics test and standard deviation that was given after the self-identification. Test the following hypothesis at alpha=5% (0.05). HO: Mean Statistics Lovers = Mean Statistics Adorers HA: Mean Statistics Lovers Mean Statistics Adorers You can assume equal variance.
Justin wants to know whether a commonly prescribed drug does improve the attention span of students with attention deficit disorder (ADD). He knows that the mean attention span for students with ADD who are not taking the drug is 2.3 minutes long. His sample of 12 students taking the drug yielded a mean of 4.6 minutes. Justin can find no information regarding σx , so he calculated s2x =1.96. a. Identify the independent and dependent variables. b. In a sentence, state the null hypothesis being tested. c. Using symbols, state the null and alternative hypotheses. d. Determine the critical region using a one-tailed test with alpha = .05. e .Conduct the hypothesis test (Do the math and compare the t-critical and t-obtained values). f. State your conclusions in terms of H0 (Should you reject the H0 or fail to reject/accept the H0). g. Based on your analysis, is there a relationship between the drug and attention span?
A knewton.com The following data was calculated during a study about medication side effects. Use the following information to choose the correct interpretation for this hypothesis test: • The alternative hypothesis is H:p + 0.12 • The test statistic is calculated as zo = -1.54. • Based on the z- table, the p– value is approximately 0.124. Use the curve below to help visualize your answer. Select the appropriate test by dragging the blue point to a right-, left- or two-tailed diagram, then set the test statistic on the x-axis to visualize the p-value. Move the blue dot to choose the appropriate test Q Search or enter website name 2# %24 & 2 3 4 7 8. 9. { W E T Y U D F G H. J K
A sample of n=4 scores has a mean of M=75. Find the z-score for this sample: a. If it was obtained from a population with u= 80 and o=10. b. If it was obtained from a population with u=80 and o=20.
A sample of n=4 scores has a mean of M=75. Find the z-score for this sample: a. If it was obtained from a population with m=80 and SD=10. b. If it was obtained from a population with m=80 and SD=20. c. If it was obtained from a population with m=80 and SD=40.
Q.4.1 Construct a 99% confidence interval for the true proportion of all employees ofPeople Plus Pty who believe that they should be given a raise by the company,given that 115 out of a sample of 135 employees support this suggestion.Interpret your answer.

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	A.	There is a 65% chance of correctly rejecting the H0 assuming the H1 is true
	B.	There is a 65% chance of incorrectly rejecting the H0 assuming the H0 is true
	C.	There is a 65% chance of incorrectly retaining the H0 assuming the H1 is true
	D.	There is a 65% chance of correctly retaining the H0 assuming the H0 is true