select the letter of the correct answer in the Choices. Questions: 1. What is the mean? Choices: A. 65 B. 75 C. 85 D. 95 2. What is the standard deviation? Choices: A. 10 B. 5 C. 15 D. 20 3. What is...

select the letter of the correct answer in the Choices.

Questions:

1. What is the mean?

Choices: A. 65 B. 75 C. 85 D. 95

2. What is the standard deviation?

Choices: A. 10 B. 5 C. 15 D. 20

3. What is the area of the shaded region?

Choices: A. 0.9972 B. 0.9525 C. 0.9544 D. 0.0228