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Anna11 [10]
2 years ago
6

On a standardized exam, the scores are normally distributed with a mean of 300 and a standard deviation of 50. Find the z-score

of a person who scored 150 on the exam.
Mathematics
1 answer:
Radda [10]2 years ago
5 0

Answer:

z = -3

Step-by-step explanation:

<u>Use the formula for z-score</u>

z=\frac{x-\mu}{\sigma}\\\\z=\frac{150-300}{50}\\ \\z=\frac{-150}{50}\\ \\z=-3

This tells us that the person's score of 150 puts him/her 3 standard deviations below the mean of 300.

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