Sample data consist of temperatures recorded for two different groups of items that were produced by two different production techniques. A quality control specialist plans to analyze the results. She begins by testing for equality of the two population standard deviations.
a. If she adds the same constant to every temperature from both groups, how is the value of the test statistic F affected?
b. If she multiplies every score from both groups by the same constant, how is the value of the test statistic F affected?
c. If she converts all temperatures from the Celsius scale to the Fahrenheit scale, how is the value of the test statistic F affected?