Question

19:

Bags of a certain brand of tortilla chips claim to have a net weight of 14 oz. Net weights actually vary slightly from bag to bag and are normally distributed with mean µ. A representative of a consumer advocate group wishes to see if there is any evidence that the mean net weight is less than advertised and so intends to test the hypotheses Ho: µ = 14, Ho: µ < 14. To do this, he selects 25 bags of this brand at random and determines the net weight of each. He finds the sample mean to be = 13.91 and the sample standard deviation to be s = 0.25. Based on these data, we would conclude

A) we would reject Ho at significance level 0.10 but not at 0.05.

B) we would reject Ho at significance level 0.05 but not at 0.025.

C) we would reject Ho at significance level 0.025 but not at 0.01.

D) we would reject Ho at significance level 0.01.

Answer 1