Question

Your company makes widgets and claim to investors that you produce 250 widgets/days. From previsous studies, it is assumed that the population standard deviation in the number of widgets produced per day is 15. as quality control manager, you randomly choose 64 days and get average widget production of 247

Q1 is there evidence that the average number of widgets produced per day is different than 250 at the 0.05 level of significance

Q2 what is your P-value in Q1

Q3 what is the power of the test in (1) and the probability of a type II error if the population widget production is actually 245

Q4 WOULD YOUR response change for Q1,2, and 3, if this was a one-sided test instead of a two-sided test? how would they change

Answer 1