B1. Using the SPSS dataset Polit2SetA, determine the mean, range, standard deviation, and variance for the variable age1bir (Participants’ age at first birth). To do this, click on Analyze (on the top toolbar menu), then select Descriptive Statistics from the pull-down menu, then Descriptives. When the dialog box appears, move the variable age1bir into the variable list, then click the pushbutton labeled Options. Click on Mean (at the top), then Std.

Deviation, Variance, and Range under “Dispersion.” What are the values of these descriptive statistics?