1 A team of researchers studied the effects of sleep depriva

1. A team of researchers studied the effects of sleep deprivation on decay of short-term memory. Eight participants stayed in a lab for 2 days. Four were randomly assigned not to sleep during that period. The other four were allowed to sleep when they wanted to do so. At the end of the 2 days, the participants completed a short-term memory task (use one-tailed test). Here are the results: Mean Time (Seconds) for Remembering Sleep Deprived Normal Sleep 7 9 8 8 7 11 9 7 a) What is the null hypothesis? What is the research hypothesis? -The null hypothesis is b) What is the mean of the comparison distribution? c) What is the pooled estimated population variance? What is the standard error? d) Determine the cutoff score on the comparison distribution (= 0.05). e) Determine your sample’s score on the comparison distribution. f) Decide whether to reject the null hypothesis. g) Figure the effect size and find the approximate power of this study.

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