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

Question

Marquis Ali

SAT

19 December, 14:04

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

+4

Answers (1)

Know the Answer?

Darnell Barker · Answer 1

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

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. 200B. 210C. 238D. 170

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