Which of the following statements are true? There may be more than one correct

statement; check all that are true.

a) The standard deviation will be equal to 0 only if all the observations in a data

set are equal.

b) For right-skewed distributions, the mean is typically greater than the median.

c) Boxplots are typically used to illustrate the shape of a distribution, whereas

histograms are best used to compare two or more groups.

d) Q2 is always exactly halfway between Q₁ and Q3.