Question

Given a mean of 7.6 and a standard deviation of 3.1, what is the z-score of the value 5 rounded to the nearest tenth?

A: -0.8

B: -0.3

C: 0.8

D: 0.3

Answer 1

-0.8

Explanation:

Answer 2

Given mean μ = 7.6 and standard deviation σ =3.1

The z score value for x= 5 is given by

Z =
`(x - mean)/(standard deviation)`

Z =
`(5 - 7.6)/(3.1 )`

Z = -0.8387

The Z- score value rounded to nearest tenth is -0.8

The correct answer choice is A. -0.8