Use at least two different software packages to conduct the statistical test. For instance, use Excel and a statistics package like SPSS or JMP. Are the results the same? Comment.
What statistical test of differences is appropriate in the following situations?
a. Comparison of average campaign contributions (in $) of Democrats, Republicans, and Independents.
b. Advertising managers and brand managers have responded “Yes,†“No,†or “Not sure†to an attitude question. The advertising and brand managers’ responses are to be compared.
c. One-half of a sample received an incentive in a mail survey while the other half did not. A comparison of response rates is desired.
d. A researcher believes coupon links pushed through Facebook.com will generate more sales than coupon links pushed through Twitter.com.
e. A manager wishes to compare the job performance of a salesperson before ethics training with the performance of that same salesperson after ethics training.
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