Question

A normal distribution of data has a mean of 15 and a standard deviation of 4. How many standard deviations from the mean is 25?
C)0.16
B)0.4
C)2.5
D)6.25

Answer 1

how much does 25 differ from 15?

Answer 2

10

Answer 3

exactly, and how many times does 4 fit into 10? in other words how often can you divide 10 by 4?

Answer 4

at lest 2 times.

Answer 5

indeed, but not nearly as much as 6 times. So i guess you can deduce the answer from that.

Answer 6

its c

Answer 7

yup

Answer 8

Okay thanks