For the following question, you will use the class data set. Use SPSS and include output from SPSS to get full credit.

aShow all of you work to get full credit.

1. For the following question, you will use the class data set. Use SPSS and include output from SPSS to get full credit.

Is there any gender difference in belief on intelligence rigidity in this class (“You can learn new things, but you can’t really change your basic intelligence”) ?  Report t-score value and significance level to support your claim. 

• 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

  a)  What is the null hypothesis?  What is the research hypothesis?

  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 (a= 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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