contestada

The grades of a statistics midterm are normally distributed with a mean of 70 and a standard deviation of 2. Without using a calculator, what is the probability that a student will receive a grade between 74 and 76?
Group of answer choices

a. 34.12%

b. 4.30%

c. 13.6%

d. 2.15%

Respuesta :

raylmandie

Answer:

The Empirical Rule can be used to solve this problem since a grade of 74 is exactly 2 standard deviations above the mean and a grade of 76 is exactly 3 standard deviations above the mean.

Step-by-step explanation:

This is all I know. But 34.12% is NOT the answer.