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14.ED.A: For a study of the average duration of time to graduation from college, 100 students...

14.ED.A:

For a study of the average duration of time to graduation from college, 100 students are randomly selected. They are found to have a mean time to graduation of 4.6 years and a standard deviation of 2 years.

(a) What is the sampling distribution?

(b) Check assumptions and conditions.

(c) What is the probability of a single student taking five years or more to graduate?

(d) What is the probability that the average time to graduation of a sample of 100 students graduating in five years or more?

Math   Statistics-And-Probability   
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