On a standardized exam, the scores are normally distributed with a mean of 40 and a standard deviation of 5. Find the z-score of a person who scored 25 on the exam.

Question

asked Dec 22, 2022 127k views

1 Answer

Spiro Michaylov · Answer 1 · 2022-12-29T02:03:05+0000

Answer:

The correct solution is "3".

Explanation:

Given that:

Mean of distribution,

x = 49

Standard deviation,

$\sigma=5$

Score,

$\mu=25$

Let the score in an exam be "x".

Now,

The z-score will be:

=
$(x-\mu)/(\sigma)$

On putting the values, we get

=
(40-25)/(5)

=
(15)/(5)

=