The mean retail price of agriculture books in 2005 was $57.61. This year’s retail mean price for 28 randomly selected agriculture books was $54.97. Assume that the population standard deviation of...

The mean retail price of agriculture books in 2005 was $57.61. This year’s retail
mean price for 28 randomly selected agriculture books was $54.97. Assume
that the population standard deviation of prices for this year’s agriculture
books is $8.45.

(d)Does the interval in part (c) support the result in part (a)? Explain your
answer.

part A) answer: z= -1.65, two tailed ctritical value at 5% significance level is -1.96

part C) answer= CI=(51.84,58.10)