Question

A data research company finds that monthly sales of hard disks in California is 1.445 million units on average with a standard deviation of 45,000. What is the z-score corresponding to 1.500 million units

Answer 1

@rational This one seems easy as well but again I cant get it. I just dont seem to be good at this whole z-units thing

Answer 2

45,000 = 0.045 million

Answer 3

z-score formula:

z-score = (given data value - mean)/standard deviation

Answer 4

mean = 1.445
standard deviation = 0.045

given data value = 1.5

plug them in the zscore formula given by Vocaloid

Answer 5

.0005

Answer 6

doesn't look correct
try again

Answer 7

z-score = (given data value - mean)/standard deviation

= (1.5 - 1.445)/0.045
= ?

Answer 8

\[1.5-1.445/.0045\]

Answer 9

12.22

Answer 10

try again

Answer 11

1.222 sorry

Answer 12

Yep!

Answer 13

Ty so much!