Question

A total of 150 students have taken an Algebra 2 final exam. The scores are normally distributed with a mean of 71% and standard deviation of 6%. How many students would you expect have scored between 65% and 77%?

Answer 1

Answer:

102 students

Step-by-step explanation:

Note that 65% and 71% are both 1 standard deviation from the mean (71%).  According to the empirical rule, 68% of scores lie within 1 std. dev. of the mean.

68% of 150 students would be 0.68(150 students) = 102 students