This is a practice question and wanting to compare results with another, could you give me your findings that I might compare, thank you!

This is a practice question and wanting to compare results with another, could you give me your findings that I might compare, thank you!

A researcher gives a group of participants (n = 15) a memory technique to use. He finds that they remember on average twenty words (sample standard deviation = 3) while the average number of words remembered in the population is 15.

a.    What is the null hypothesis?

b.    What is the research hypothesis?

c.    Is this a one or two tailed hypothesis?

d.    Which test should you use? Why?

e.    Calculate the appropriate statistical test.

f.     What is the critical value for α = .05?

g.    What do you conclude?