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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.

User Elfred
by
8.3k points

1 Answer

2 votes

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)

=
3

User Spiro Michaylov
by
8.1k points

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