8.81 a&b

Project Description:

the manufacture of boston and vermont asphalt shingles knows that product weight is a major factor in the customer's perception of quality. the last stage of the assembly line packages the shingles before they are placed on wooden pallets. once a pallet is full (a pallet for most brands holds 16 squares of shingles), it is weighed and the measurement is recorded. the attached file contains the weight (in pounds) from a sample of 368 pallets of boston shingles and 330 pallets of vermont shingles.

a) for the boston shingels, construct a 95% confidence interval estimate for the mean weight.

b) for the vermont shingles, construct a 95% confidence interval estimate for the mean weight.
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Price Type: Negotiable

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