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1. The weight of bearings contained in a 2 lb package is normally distributed with a...

1. The weight of bearings contained in a 2 lb package is normally distributed with a mean of 2.1 lb and a standard deviation of 0.2 lb.

(a) What proportion of bearing packages are overweight (i.e. more than the advertised weight of 2 lbs)?

(b) If a given package weighs above 2 lbs, what is the probability that it weighs less than or equal to 2.4 lbs?

(c) What should the standard deviation be in order that only .2 % of the bearing packages weigh over 2.2 lbs?

math   Statistics-And-Probability   
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