you constructed a histogram for the interarrival times. Describe the shape of the population of interarrival times.

b. Find the mean and standard deviation of the population of interarrival times. PHISH

c. Now consider a random sample of n = 40 interarrival times selected from the population. Describe the shape of the sampling distribution of x, the sample mean. Theoretically, what are mx and sx?

d. Find P1x 6 902.

e. Use a random number generator to select a random sample of n = 40 interarrival times from the population, and calculate the value of x. (Every student in the class should do this.)

f. Refer to part

e. Obtain the values of x computed by the students and combine them into a single data set. Form a histogram for these values of x. Is the shape approximately normal? g. Refer to part

f. Find the mean and standard deviation of the x values. Do these values approximate mx and sx, respectively? Applying the Concepts—Advanced