Exercise

Exercise 5. Indicator variables

To see why treating the reported heights as an ordinal value is not useful in practice we note how many values are reported only once.

Instructions

100 XP

In the previous exercise we computed the variable tab which reports the number of times each unique value appears. For values reported only once tab will be 1. Use logicals and the function sum to count the number of times this happens.

Take Hint (-30 XP)