Lab Assignment 1

A researcher is interested in whether a certain hour-long film that portrays the insidious effects of racial prejudice will affect attitudes toward a minority group.One group of participants (n = 10) watched the movie, and a control group (n= 10) spent the hour playing cards.Both groups were then given a racial attitude test, wherein higher scores represented a higher level of prejudice.Data were as follows:

Movie GroupControl Group

89

910

712

815

9 13

912

1013

1114

11 12

1010

Use SPSS to conduct an independent samples t-test for the above problem.Use the data editor to input the data, and then select 'analyze' from the menu at the top.Select 'compare means' and then look for independent samples t-test.Use the arrows to select your grouping or independent variable and your test or dependent variable.You must then define your groups by clicking on the 'define groups' button.Label your groups as "1" and "2" and then hit 'ok.'

An output file should be generated when you run the test.You can double check that you did it right by computing the t-test by hand.Note that you must compute the mean and standard deviation for yourself to do so.