1. Use the standard normal distribution to find P1.26z2.61.

2. Assume that z scores are normally distributed with a mean of 0 and a standard deviation of 1. If =P<a<za0.9164, find a.

3. Assume that blood pressure readings are normally distributed with a mean of 125 and a standard deviation of 4.7. If 36 people are randomly selected, find the probability that their mean blood pressure will be less than 127.

4. Use the Central Limit Theorem to find the mean and standard error of the mean of the indicated sampling distribution.

The amount of time employees of a telecommunications company have worked for the company are normally distributed with a mean of 5.1 years and a standard deviation of 1.9 years. Random samples of size 21 are drawn from the population and the mean of each sample is determined.