Question

two histograms showing the number of pets owned by boys and girls in a science class are each skewed left. which measure of variability should be used to describe the data?
mean
median
standard deviation
interquartile range

Explanation:

Step1: Recall measures of variability

Measures of variability include standard deviation, inter - quartile range. Mean and median are measures of central tendency.

Step2: Consider skewed data

For skewed data (left - skewed in this case), the inter - quartile range is a more robust measure of variability. Standard deviation is affected by extreme values (which are more prominent in skewed data).

Answer:

interquartile range