Question

For a certain year, the mean math SAT score nationally was 527 with a standard deviation...

For a certain year, the mean math SAT score nationally was 527 with a standard deviation of 86. Scores were normally distributed.

Which value below is closest to the highest math SAT score a person could get and still be in the lowest 30% for the population of all math SAT scores?

A.

380
B.

680
C.

480
D.

580
Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Given that, mean (μ) = 527 and

standard deviation = 86

We want to find, the value of x such that, P(X < x) = 0.30

Therefore, the value closest to the highest math SAT score a person could get and still be in the lowest 30% for the population of all math SAT scores is 480.

Answer : C) 480

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