The R. R. Bowker Company of New York collects information on the retail prices of books. In 2000, the mean retail price of agriculture books was $66.52. This year's retail prices for 46 randomly selected agriculture books resulted in a mean of $63.88. If the standard deviation of prices for this year's agriculture books is $8.45, test the claim at 10% significance level that this year's mean retail price of agriculture books has changed from the 2000 mean? Is this a z-score or a t-score problem? Ho H HA: H $ Is this right-tailed, left-tailed, or two-tailed test? Test statistic Critical value OR P-value Decision Conclusion There is evidence to the claim that the mean retail price has changed