A student researcher wanted to know whether memory for 20 items on a grocery list was better when a bizarre image was created for each item, compared with a strategy of simply trying to remember the items. For each participant in his study, he recorded the number of grocery items recalled without the image and the number of grocery items recalled when bizarre images were used.
Image: 16, 8, 10, 19, 12, 14
No Image: 15, 5, 8, 11, 13, 10
a. What are the hypotheses?
b. State your critical value(s) using α = .05.
c. Conduct the test. Be sure to include the following, if necessary - test statistic, degrees of freedom, computations...
d. What do you conclude? Interpret your results.
e. What is the 95% confidence interval?