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Rejection Rate Hypothesis

It is suspected that the rejection rate for a plastic-cup-molding machine is dependent on the temperature at which the cups are molded. A series of short tests is conducted to examine this hypothesis with the following results:

Temperature Total Production Number Rejected
T1 150 12
T2 75 8
T3 120 10
T4 200 13

On the basis of these data, do you agree with the hypothesis?

Solution Summary

This solution determines the rejection rate corresponding to each temperature using the Chi-Squared test with step-by-step calculations and explanations. It also decides to accept or reject the null hypothesis.