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3 years ago

3a. The average for the statistics exam was 75 and the standard deviation was 8.

Mathematics

1 answer:

hjlf3 years ago

3 0

Answer:

Step-by-step explanation:

The formula to when given the number of standard deviations below the mean x =μ - nσ

Where:

x = raw score

μ is the population mean = 75

σ is the population standard deviation = 8.

n = number of standard deviations below the mean

Hence

x = 75 - 1.5 × 8

x = 75 - 12

x = 63

Therefore, Andrey's exam score is 63

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