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 of a trip for pre- and post-retirees. A sample of 705 travelers were asked how long they stayed on a typical trip. The observed results of the study are found below. Number of Nights Pre-retirement Post-retirement Total 4-7 239 164 103 8 - 13 83 67 150 14 - 21 34 58 92 22 or more 23 37 60 Total 379 326 705 With this information, construct a table of estimated expected values. Number of Nights Pre-retirement Post-retirement 4-7 8 - 13 14 - 21 22 or more Now, with that information, determine whether the length of stay is independent of retirement using a = 0.05. (a) x2 (b) Find the degrees of freedom: 3 (c) Find the critical value: (d) The final conclusion is O A. We can reject the null hypothesis that the length of stay is independent of retirement and accept the alternative hypothesis that the two are dependent. O B. There is not sufficient evidence to reject the null hypothesis that the length of stay is independent of retirement