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24 August, 09:38

Students at XYZ Senior High School took a practice SAT. Their scores were normally distributed with a mean score of μ = 675 and a standard deviation of σ = 25. If 250 students took the test, how many of them scored 700 or better?

A. 200

B. 210

C. 238

D. 170

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Answers (1)
  1. 24 August, 12:38
    0
    210

    Explanation:

    with the 68-90-99.7 rule about 84% of students would get a 700 or better because its one std dev away from the mean so 50+34=84%

    .84*250=210
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Home » SAT » Students at XYZ Senior High School took a practice SAT. Their scores were normally distributed with a mean score of μ = 675 and a standard deviation of σ = 25. If 250 students took the test, how many of them scored 700 or better? A. 200 B. 210 C.
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