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:
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.
Use any numbers to label your groups, 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 (most of the problems in
the homework packet have this already computed for you).
Print the output file, and bring it to class by the assigned due dates.
Note on Saving Files: If you are using the computers in the
library you shouldn't have trouble printing the file. However, if you are
off campus the program might not recognize your printer. The easiest thing
to do is to highlight the information in your output file and 'copy' it so that
you can then 'paste' into a MS Word file for printing.