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1) A factory's worker productivity is normally distributed. One worker (worker 1) produces an average of 75 units per day with a standard deviation...

1) A factory’s worker productivity is normally distributed. One worker (worker 1) produces an average of 75 units per day with a standard deviation of 20. Another worker (worker 2) produces at an average rate of 65 per day with a standard deviation of 21. What is the productivity that during one week (5 working days) worker 1 will produce more than worker 2?


2)Hits on a personal web site occur quite infrequently. They occur randomly and independently with an average of five per week.
a) Find the probability that the site gets 10 or more hits per week.
b) Determine the probability that the site gets 20 or more hits in two weeks.

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