Name:
For all questions answer the following questions, and attach all SPSS output:
Which test is appropriate? Be specific.
Is the data significant? Can you reject the null hypothesis?
What do the results mean? Be detailed. Discuss ALL effects.
Graph with SPSS
List all DV’s and IV’s, as well as any levels.
Read each question carefully: if you use the wrong test, the question is completely wrong.
A consumer psychologist who wanted to know if customers really are influenced to buy more by sales clerks who smile more gave special instructions to clerks at eight stores in a large Canadian clothing chain at the start of a week and recorded sales for the week. Clerks in four of the randomly selected stores received instructions to be especially courteous and to be sure to smile a lot. Clerks at four other stores were simply instructed to be especially courteous. Sales (in thousands of dollars) for the four stores in the Smile condition were 36, 40, 36, and 44; sales for the four stores in the control condition were 40, 31, 27, and 30. Using the .05 significance level, do customers buy a different amount from smiling sales clerks?
A child psychologist interested in the joint effects of parental marital status (divorced or married) and child disposition (social or shy) asked 12 children to report how many times they had been bullied in the past month. The results were as follows:
Divorced Married
Social Shy Social Shy
1 5 3 1
2 6 2 2
1 7 0 0
A cognitive neuroscientist looked at brain activity in three different groups of athletes. The results are displayed below. Using the .05 significance level, is there a difference in brain activity among professionals in the three sports? Include a posthoc test.
Baseball Players Basketball Players Football Players
32 27 27
27 36 23
26 25 26
35 30 20
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