(Answered) A product is produced by two different machines two random

Statistics

A product is produced by two different machines. Two random samples were selected, and the following

summary information were computed accordingly:

Machine 1 Machine 2

Sample size 80 100

Sample mean 4.5 gm 4.4 gm

Sample standard deviation 0.5 gm 0.6 gm

a) Estimate the 80% confidence interval of the difference between the two means.

b) What are the assumptions you considered for the above solution?

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