Answered

The grades on the last science exam had a mean of 89%. Assume the population of grades on science exams is known to be distributed normally, with a standard deviation of 14%. Approximately what percent of students earn a score between 75% and 89%?

Verified Answer :

LammettHash

Are you sure the standard deviation is 14% = 0.14? I'll assume it is.

\(\mathbb P(75

I suspect the given standard deviation is wrong, and that you instead meant 14 (no percent). This would make the probability

\(\mathbb P(75

which seems a more likely answer.

Answer:

B. 34%

Step-by-step explanation:

took the test got it right