It has been suggusted that the highest priority of retirees is travel. Thus, a study was conducted to investigate the differences in the length of stay ofa trip for pre- and post-retirees sample of 711 travelers were asked how long they stayed on a typical trip. The observed results of the study are found below. Number of Nights Pre-retiremen Post-retirement Total 8 - 13 14 - 21 47 8 - 13 14 - 21 22 or more Total 250 79 37 25 391 165 74 51 30 320 415 153 88 55 711 With this information, construct a table of estimated expected values. Number of Nights 4 22 or more Pre-recirement Post-retirement Now, with that information, determine whether the length of stay is independent of retirement using a (b) Find the degrees of freedom: (c) Find the critical value: = 0.05.