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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.

Answer :

Cricetus

Answer:

The correct solution is "3".

Step-by-step explanation:

Given that:

Mean of distribution,

[tex]x = 49[/tex]

Standard deviation,

[tex]\sigma=5[/tex]

Score,

[tex]\mu=25[/tex]

Let the score in an exam be "x".

Now,

The z-score will be:

= [tex]\frac{x-\mu}{\sigma}[/tex]

On putting the values, we get

= [tex]\frac{40-25}{5}[/tex]

= [tex]\frac{15}{5}[/tex]

= [tex]3[/tex]

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