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QUESTION 4:   Flying hours for general-aviation aircraft are normally distributed with a mean of 120 hours....

QUESTION 4:   Flying hours for general-aviation aircraft are normally distributed with a mean of 120 hours. Suppose we took a random sample of n = 20 aircraft and in that sample we found the standard deviation as 25 hours. In this sample,

  1. State the sampling distribution of the mean flying hour and the parameter(s) of the sampling distribution.
  2. What is the probability that the mean flying hour will less than 110 hours? * ANSWER USING EXCEL FUNCTIONS *
  3. What is the probability that the mean flying hour will more than 130 hours? * ANSWER USING EXCEL FUNCTIONS *
  4. What is the probability that the mean flying hour will between 110 hours and 130 hours? * ANSWER USING EXCEL FUNCTIONS *

- Thank you in advance

Math   Statistics-And-Probability   
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