MAS291Xuất hiện trong 1 đề thi
A bearing used in an automotive application is supposed to have a nominal inside diameter of 1.5 inches. A random sample of 36 bearings is selected and the average inside diameter of these bearings is 1.4895 inches. Bearing diameter is known to be normally distributed with standard deviation σ = 0.02 inch. Test the hypotheses H0: μ = 1.5 versus H1: μ ≠ 1.5 using α = 0.01. Let Z0.001 = 2.326 and Z0.005 = 2.576.
Các lựa chọn
ADo not reject null hypothesis
BReject the null hypothesis