Question Two The time to down load a file from Blackboard is normally distributed with mean, =7 seconds and a standard deviation, =2 seconds. (a) What is the probability that the download time will be more than 9 seconds? (3 marks) (b) What is the probability that the download time will be under 7 seconds or over 9 seconds? (4 marks) (c) What is the probability that the download time will be between 5 and 9 seconds? (4 marks) (d) How much time in seconds will elapse before 10% of the downloads are complete? (4 marks) (e) What are the lower and upper values of X, symmetrically distributed around the mean that include 95% of the download time? (5 marks)

statistics