The scores on an exam are normally distributed, with a mean of 74 and a standard deviation of 7. What percent of the scores are less than 81?

A. 84%

B. 13.5%

C. 50%

D. 16%

Question

Mathematics

Trevor

10 February, 21:01

The scores on an exam are normally distributed, with a mean of 74 and a standard deviation of 7. What percent of the scores are less than 81?

A. 84%

B. 13.5%

C. 50%

D. 16%

+1

Answers (1)

Know the Answer?

Keagan Fry · Answer 1

A normal distribution with a mean of 74 and a standard deviation of 7.

Mean + 1 SD = 74 + 7 = 81

Less than 81 : 50 % + 34 % = 84 %

Answer:

A) 84 %

The scores on an exam are normally distributed, with a mean of 74 and a standard deviation of 7. What percent of the scores are less than 81?A. 84%B. 13.5%C. 50%D. 16%

The scores on an exam are normally distributed, with a mean of 74 and a standard deviation of 7. What percent of the scores are less than 81?

A. 84%

B. 13.5%

C. 50%

D. 16%