medal&fan! (:
Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. In a group of 230 tests, how many students score within one standard deviation of the mean?

Question

medal&fan! (:
Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. In a group of 230 tests, how many students score within one standard deviation of the mean?

dumbcow · Answer

for a normal distribution, approx 68% are within 1 std dev

emilyjones284 · Answer

These are the answers:
about 156 students
about 187 students
about 78 students
about 115 students

dumbcow · Answer

i meant 68% of the population....you are given that the population is 230

emilyjones284 · Answer

would the answer be about 156 students?

dumbcow · Answer

yes

emilyjones284 · Answer

Oh okay thank you (: