A team of cognitive psychologists studying the effects of sl

A team of cognitive psychologists studying the effects of sleep deprivation on short-term memory decay had eight participants stay in a sleep lab for two days. Four participants were randomly assigned to a condition in which they were not permitted to sleep during that period, while the other four participants were allowed to sleep when they wanted to. At the end of the two days, the participants completed a short-term memory task that yielded the results in the table that follows. Using the .05 significance level, did sleep deprivation reduce short-term memory?

(You will have to use a combination of StatCrunch and hand calculations (e.g., effect sizes) to solve the following problem. StatCrunch tutorial videos are available at http://www.youtube.com/view_play_list?p=BE055F65E43B4973)

Mean Number of Letters Remembered

Sleep Deprived   Normal Sleep

7                            9

8                            8

7                           11

9                             7

a. Create the appropriate graph for this problem.

b. Use the five steps of hypothesis testing.

c. Figure the effect size.

d. Report results in APA format.

(Please label answers)

Solution

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