5. Find z such that 36.32% of the standard normal curve lies to the left of z.

6. Find z such that 99.31% of the standard normal curve lies to the right of z.

Use these statements for 8-10. Suppose x has a distribution with a mean of 13.9 and a standard deviation of 2.1. Random samples of size n=49 are drawn.

7.What would be the mean and standard deviation of the distribution?

8. Find the z value corresponding to

9.Find P()

10. is it appropriate to use a normal distribution to approximate a binomial distribution given n=13 and p=0.6? Explain.

11.Suppose x has a normal distribution with a population standard deviation of 2.2. If a random sample of size 31 had a sample mean of 66, find a 98% confidence interval for .

12.What does E =?

13.What is the confidence interval?

14. A random sample of size 61 has sample mean 14.8 and sample standard deviation 4.2. Find a 99% confidence interval for .

15.What does E =?

16.What is the confidence interval?