Question

A random sample of size 10 selected from a bell-shaped distribution has a mean equal to 11 and a standard deviation equal to 5.4. For this sample, what is the Z-score for a measurement of 22? AO +11 BO 2.04 CO -11 D O -2.04 E O 1.1 Submit Answer

Answer 1

Solution :

Given that ,

mean = $\mu$ = 11

standard deviation = $\sigma$ = 5.4

n = 10

x = 22

Using z-score formula,

z = x - $\mu$ / $\sigma$   

z = 22 - 11/ 5.4

z = 2.04

correct option is = B.