Question

1) By the empirical rule, what percentage of the area under the normal curve lies to the left of mu, the average? Put your answer as a percentage.

2) By the empirical rule, what percentage of the area under the normal curve lies between mu - 1sd and mu + 1sd? Give your answer as a percentage.

3) By the empirical rule, what percentage of the area under the normal curve lies between mu - 3sd and mu + 3sd? Put your answer as a percentage.

4) By the empirical rule, what percentage of the area under the normal curve lies to the right of mu? Put your answer as a percentage.

Answer 1

The information here will help you with the answers:
http://www.oswego.edu/~srp/stats/6895997.htm

Answer 2

^ That's exactly what you need. Those are just numbers you need to know, no calculations there

Answer 3

Thanks yall(:

Answer 4

You're welcome :)