Question

Samples from two mold machines are weighed and compared. The data is shown below. Determine the...

Samples from two mold machines are weighed and compared. The data is shown below. Determine the 98% confidence interval for the difference between the machines.

Machine 1: nx = 65, µx = 47.8 oz, sx = 2.12 oz  

Machine 2: ny = 72, µy = 49.1 oz, sy = 1.3 oz

Determine:

a) Mean difference between samples

b) LOWER limit

c) UPPER limit

Math   Statistics-And-Probability   
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