From exhibiting.2. is the variance of the time used in the manufacture of all products by the use of machinery.S is the standard deviation of the time used in the manufacture of goods samples; S = 1.25.N is the sample of goods amounting to; n = 16.Therefore, 95% confidence interval of 2. so the beams from wondai formula.
การแปล กรุณารอสักครู่..