Mean and Standard Deviation Practice Test

A discrete random variable $Q$ represents the number of questions a student answers correctly on a 12-question quiz. The distribution of $Q$ has mean $\mu_Q=8.9$ and standard deviation $\sigma_Q=1.4$. Which interpretation of the standard deviation is correct?

A school counselor records the number of days absent in a semester for each student. Let $X$ be the number of absences for a randomly selected student; $X$ is discrete. The distribution of $X$ has mean $\mu_X=5$ days and standard deviation $\sigma_X=2$ days. Which interpretation of the standard deviation is correct?