a-quality-control-manager-inspects-80-items-and-finds-12-defective-if-the-histor

Question

A quality control manager inspects 80 items and finds 12 defective. If the historical defect rate is 10%, is this sample result consistent with the historical rate? (Use the sampling distribution of p̂.)

Accepted Answer

Yes, the sample result is consistent with the historical rate.

Answer

No, the sample result is significantly higher.

Answer

No, the sample result is significantly lower.

Answer

Yes, but only at α = 0.10.