A company offers all its employees a physical each year. The blood cholesterol level for men aged 30 to 39 has a standard deviation of 12 mg/dL. For women in the same age group, the standard deviation is 24 mg/dL. A sample of 20 men aged 30 to 39 had a mean cholesterol level of 204 mg/dL.
A sample of 28 women aged 30 to 39 had a mean cholesterol level of 210 mg/dL.

What is the probability of observing these sample means if the population means are the same?

0.2542
0.1271
1.14
-1.14

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?