The average number of babies born in a certain town each year is 218 with a standard deviation of 26.How many standard deviations from the mean is a year with 387 babies born?
A)3.25 standard deviations below the mean
B)6.50 standard deviations above the mean
C)3.25 standard deviations above the mean
D)6.50 standard deviations below the mean
E)1.78 standard deviations above the mean

Question

Quizplus · Accepted Answer

The z-score for a year with 387 babies born is (387 - 218) / 26 = 6.50. This means that a year with 387 babies born is 6.50 standard deviations above the mean.

The Average Number of Babies Born in a Certain Town