ABC/123 Version X
Week 3 Practice Worksheet
PSY/315 Version 6
University of Phoenix Material
Week 3 Practice Problems Worksheet
Please answer the following questions in a 150-word response minimum. Try your best to reference the text if needed please do so using this information I have provided. Go to this website https://www.textbooks.com/, and log in using the email address email@example.com and then the password is ion123. Once you have logged on, click on the top right hand corner of the screen the greets you saying “Hello Robert”. Once you have clicked it, there is an option for digital booskshelf, and a button that allows you to access the text book. If you have any question do not hesitate to ask.
Prepare a written response to the following questions.
1. List the four steps of hypothesis testing, and explain the procedure and logic of each.
2. Based on the information given for the following studies, decide whether to reject the null hypothesis. Assume that all populations are normally distributed. For each, give:
a. The Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected.
b. The Z-score on the comparison distribution for the sample score.
c. Your conclusion.
Tails of Tests
1 (high predicted)
1 (High predicted)
3. A researcher predicts that listening to music while solving math problems will make a particular brain area more active. To test this, a research participant has her brain scanned while listening to music and solving math problems, and the brain area of interest has a percentage signal change of 58. From many previous studies with this same math problem’s procedure (but not listening to music), it is known that the signal change in this brain is normally distributed with a mean of 35 and a standard deviation of 10.
Using the .01 level, what should the researcher conclude?
a. Solve this problem explicitly using all four steps of hypothesis testing,
b. Illustrate your answer with a sketch showing the comparison distribution, the cutoff (or cutoffs), and the score of the sample on this distribution.
c. Explain your answer to someone who has never had a course in statistics (but who is familiar with mean, standard deviation, and Z scores).
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