Question

The mean of a set of credit scores is u=690 and o=14. Which credit score is within z-score of 3.3?
A)634
B)640
C)720
D)750

Answer 1

I think it is C

BMK ><

Answer 2

Answer:

c)720

Step-by-step explanation:

The mean of a set of credit scores is u=690 and o=14.

mean = 690  and standard deviation SD = 14

We use z- score formula

$z=\frac{x-mean}{SD}$

z= 3.3 given

Plug in the values and find out x

$3.3=\frac{x-690}{14}$

Multiply 14 on both sides

46.2 = x- 690

Now add 690 on both sides

x= 736.2

Credit score is 720 that comes under 736.2

So answer is 720