In 2005, the mean retail price of statistics books was $57. This year's retail prices for 10 randomly selected statistics books are shown in the following table. 59 67 57 46 | 62 52 37 50 60 54...

Extracted text: In 2005, the mean retail price of statistics books was $57. This year's retail prices for 10 randomly selected statistics books are shown in the following table. 59 67 57 46 | 62 52 37 50 60 54 Determine if the data provide sufficient evidence to conclude that this year's mean retail price of statistics books has increased from the 2005 mean? Assume that the population standard deviation of prices for this year's agriculture books is $8.4. Perform hypothesis testing using both critical value approach and P-value approach at the 5% significance level also determine the strength of evidence against the null hypothesis.