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14) One truck from Lakeland Trucking, Inc. can carry a load of 3880.8 lb. Records show...

14) One truck from Lakeland Trucking, Inc. can carry a load of 3880.8 lb. Records show that the weights of loads   have a mean of 3500 lb and a standard deviation of 140 lb.  For samples of size 49, find the mean and standard deviation of   .

Math   Statistics-And-Probability   
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Answer #1

Solution :

Given that ,

mean = = 3500

standard deviation = = 140

n = 49

sample distribution of sample mean is ,

=

= 3500

sampling distribution of standard deviation

=  / n = 140/ 49

= 20

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