Suppose we have a distribution of student exam scores on an easy test. What measure of spread would be best to describe this data?
A)The spread should be described with the standard deviation because the distribution will be symmetric.
B)The spread should be described with the IQR because the distribution will be symmetric.
C)The spread should be described with the standard deviation because the distribution will be skewed to the left.
D)The spread should be described with the IQR because the distribution will be skewed to the left.

Question

Quizplus · Accepted Answer

The distribution of scores on an easy test is likely to be skewed to the left, as most students will score high. In such cases, the IQR is a better measure of spread as it is less affected by skewness and outliers.

Suppose We Have a Distribution of Student Exam Scores on an Easy