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nikdorinn [45]
2 years ago
7

On a standardized exam, the scores are normally distributed with a mean of 145 and a standard deviation of 25. Find the z-score

of a person who scored 210 on the exam
Mathematics
1 answer:
Kryger [21]2 years ago
5 0

Answer:

z = 2.6

Step-by-step explanation:

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

z=\frac{x-\mu}{\sigma}\\ \\z=\frac{210-145}{25}\\ \\z=\frac{65}{25}\\ \\z=2.6

This tells us that this person's score of 210 places them 2.6 standard deviations above the mean

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