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A total of 200 rods have been manufactured. You sample 50 of the rods and find that they have a mean length of 15.5 inches

A total of 200 rods have been manufactured. You sample 50 of the rods and find that they have a mean length of 15.5 inches with a standard deviation of 1.73 inches. Find the 80 % confidence limit for the mean length for all of the rods.

The population is finite. So, we should use Case 3: Finite population

the equation that should be used isxznsN1Nn<u<x+znsN1Nn

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