A manufacturer of potato chips would like to know whether it’s bag filling machi

Question

A manufacturer of potato chips would like to know whether it’s bag filling machine works correctly at the 423 gram setting. It is believed that the machine is underfilling the bags. A 12 bag sample had a mean of 417 grams with a standard deviation of 27. A level of significance of 0.05 will be used. Assume the population distribution is approximately normal. Determine the decision rule for rejecting the null hypothesis. Round your answer to 3 decimal places. Reject Ho if t < ?? A manufacturer of potato chips would like to know whether it’s bag filling machine works correctly at the 423 gram setting. It is believed that the machine is underfilling the bags. A 12 bag sample had a mean of 417 grams with a standard deviation of 27. A level of significance of 0.05 will be used. Assume the population distribution is approximately normal. Determine the decision rule for rejecting the null hypothesis. Round your answer to 3 decimal places. Reject Ho if t < ?? Reject Ho if t < ??

Explanation / Answer

H0: Population mean is 423 gms
H1: Population mean is less than 423 gms

This means that it is a single-sided test

The critical value at df=12-1=11 is found by using excel formulae =T.INV(0.05,11) and comes equal to -1.796

So, Reject H0 if t < -1.796

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