For the recall data, suppose we wish to test that the mean number of words recalled...
For the recall data, suppose we wish to test that the mean number of words recalled in the memory group and the mean number of words recalled in the control group are the same (i.e. the difference in means is 0). Suppose your colleague thinks that the subjects in the memory group will recall more words, on average. What would be the alternative hypothesis for this test?
Median(memory) > Median(Control)
Mean(memory) < Mean(control)
Mean(memory) > Mean(control)
Mean(memory) not equal to Mean(control)
Suppose that the true difference in means for the number of words recalled in the memory group and the control group is 0 (i.e. there is no effect of learning the memory tricks in the recall study). However, we reject the null hypothesis. What type of error has been made?
Type I Error
Calculation error
Type II Error
No error
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