Exercise 1 The "House of Blues" in Boston is planning its budget for next year. In estimating the security man-hours needed for concerts, the average length of concerts is required. Using a random...

Extracted text: Exercise 1 The "House of Blues" in Boston is planning its budget for next year. In estimating the security man-hours needed for concerts, the average length of concerts is required. Using a random sample of n = 36 previous concerts, the sample mean duration is x = 110 minutes, while the population standard deviation is o = 20 minutes. (a) What is the population, the sample, the unit and the variable measured? (b) Using Minitab, determine the 95% confidence interval for the true mean duration u of concerts using the sample data.