Question

Given a mean of 61.2 and a standard deviation of 21.4, within how many standard deviations of the mean do the values 45,78,62,90, and 31 fall?

Answer 1

Are there any answer choices?

Answer 2

A:0
B:1
C:2
D:3

Answer 3

@amistre64 Could you assist him please. Thanks!

Answer 4

use the z formula:\[z=\frac{x-mean}{sd}\]

Answer 5

or use the largest and smallest of the range to determine which has the largest |z|