The life expectancy in the United States is 78 with a standard deviation of 6 years. A random sample of 64 individuals is selected.
a.What is the probability that the sample mean will be larger than 80 years?b.What is the probability that the sample mean will be less than 76.5 years?c.What is the probability that the sample mean will be between 76 and 82 years?d.What is the probability that the sample mean will be between 74 and 77 years?e.What is the probability that the sample mean will be larger than 76 years?
What will be an ideal response?
?
| a. | 0.0038 |
| b. | 0.0228 |
| c. | 0.9962 |
| d. | 0.0912 |
| e. | 0.9962 |
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