Question

Suppose that BC financial aid alots a textbook stipend by claiming that the average textbook at BC bookstore costs $ 81.33. You want to test this claim.

The null and alternative hypothesis in symbols would be:

a) H0:μ≥81.33H0:μ≥81.33
H1:μ<81.33H1:μ<81.33

b) H0:p≤81.33H0:p≤81.33
H1:p>81.33H1:p>81.33

c) H0:μ=81.33H0:μ=81.33
H1:μ≠81.33H1:μ≠81.33

d) H0:p=81.33H0:p=81.33
H1:p≠81.33H1:p≠81.33

e) H0:p≥81.33H0:p≥81.33
H1:p<81.33H1:p<81.33

f) H0:μ≤81.33H0:μ≤81.33
H1:μ>81.33H1:μ>81.33

The null hypothesis in words would be:

a)The average price of textbooks in a sample is $ 81.33

b)The average price of all textbooks from the store is $ 81.33

c)The average of price of all textbooks from the store is less than $ 81.33.

d)The proportion of all textbooks from the store that are less than 81.33 is equal to 50%

e)The average of price of all textbooks from the store is greater than $ 81.33.

Based on a sample of 50 textbooks at the store, you find an average of 86.53 and a standard deviation of 18.4.

The point estimate is: [ ] (to 3 decimals)

The 95 % confidence interval (use z*) is: [ ] to [ ] (to 3 decimals)

Based on this we:

a) Reject the null hypothesis

b)Fail to reject the null hypothesis

Answer 1