
Concept explainers
Age of Marriage A student did a survey on the age of marriage for married male and female students.
a. Is the format of the data set stacked or unstacked?
b. If you answered “stacked” then unstack the data into two columns. If you answered “unstacked” then stack the data into one column; choose an appropriate name for the stacked variable and use coding.
c. There are two variables here: Gender and Age. Which of them is numerical, and which is categorical?

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