Question

Use GSS file for this spss problem. Calculate the 95% confindence interval for the following variables, comparing lower, working, middle, and upper classes, (CLASS) in the GSS sample. Use the explore procedure using class as your factor variable

Answer 1

A confidence interval is the mean of the estimate plus and minus the variation that is in that estimate.

What is a confidence interval?

Your information is incomplete as the data is not given. Therefore, an overview will be given. A confidence interval is the range of values you expect your estimate to fall between when you redo your test, within a certain level of confidence.

A 95% confidence interval means that we are to take 100 different samples and compute a 95% confidence interval for each sample, then 95 of the 100 confidence intervals will contain the true mean value.

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