US Mail The weights of a certain class of packages which go through the US Mail...

US Mail The weights of a certain class of packages which go through the US Mail are normally distributed with a mean value of 22 lbs with a standard deviation of 4 lbs. 1) Referring to US Mail, find the probability that a randomly selected package weighs more than 18 lbs.

a) 0.9332 b) 1.0000 c) 0.0000 d) 0.0668 e) 0.0316

2) Referring to US Mail, find the 65th percentile of package weights, i. e., find a value c so that there is a 65% chance that randomly selected package weighs less than c and there is a 35% chance that a randomly selected box weighs more than c.

a) 12.87 b) 13.28 c) 13.56 d) 13.96 e) 14.28

3) Referring to US Mail, find the probability that a randomly selected package weighs between 4 and 26 lbs.

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Expert Solution

orchestra answered 1 year ago

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