Question

Suppose X is the time it takes a randomly chosen clerical worker to type and send a standard letter of recommendation. Suppose X has a normal distribution, and assume the mean is 10.5 minutes and the standard deviation 3 minutes. You take a random sample of 50 clerical workers and measure their times. What is the chance that their average time is less than 9.5 minutes?

Answer 1

Answer:

सुना हैं काफ़ी पढ़ लिख गये हो तुम, कभी वो भी पढ़ो जो मै कह नहीं पाता