Refer to Exercise 1.54 and data set EX0154. When the heights of these 105 students were recorded,

Question:

Refer to Exercise 1.54 and data set EX0154. When the heights of these 105 students were recorded, their gender was also recorded.
Exercise 1.54
The self-reported heights of 105 students in a biostatistics class are described in the relative frequency histogram below.

a. What variables have been measured in this experiment? Are they qualitative or quantitative?
b. Look at the histogram from Exercise 1.54 along with the comparative box plots shown below. Do the box plots help to explain the two local peaks in the histogram? Explain.