Susan, a school teacher in Norway, is planning on traveling overseas during her holidays in December. Since most schools are shut in December, the holiday season, Susan wants to determine if there is any difference in the average price of air tickets sold during December. She recorded the 7 days’ air ticket prices for each week in December and determined that the sum of squares flight ticket price between the 4 weeks is 1205.89 and the sum of squares air ticket price within a week is 24789.32. 

a. Use the provided information to prepare the analysis of variance table.
b. Test the null hypothesis that the population mean flight ticket prices are the same in these four groups.