A supervisor finds the mean number of miles that the employees in a department live from work. He finds mc022-1.jpg and mc022-2.jpg. Which of these statements must be true?
a. z37 is within 1 standard deviation of the mean.
b. z37 is between 1 and 2 standard deviations of the mean.
c. z37 is between 2 and 3 standard deviations of the mean.
d. z37 is more than 3 standard deviations of the mean.
