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. Assume net weights are normally distributed. 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 H0: μ = 14, Ha: μ < 14. To do this, he selects 16 bags of tortilla chips of this brand at random and determines the net weight of each. He finds a sample mean of 13.88 oz with a standard deviation of s = 0.24 oz.
What is the value of the test statistic?
Select one:
a. t = -8.55
b. t = -0.10
c. t = -0.75
d. t = -2.00
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. Assume net weights are normally distributed. 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 H0: μ = 14, Ha: μ < 14. To do this, he selects 16 bags of tortilla chips of this brand at random and determines the net weight of each. He finds a sample mean of 13.88 oz with a standard deviation of s = 0.24 oz.
Determine which of the following statements regarding the decision the representative would make is true:
Select one:
a. He would not reject H0 at a significance level of 0.05
b. He would reject H0 at a significance level of 0.05 but not at 0.025.
c. He would reject H0 at a significance level of 0.01.
d. He would reject H0 at a significance level of 0.025 but not at 0.01