Question

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 681681 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
4−74−7	238238	161161	399399
8−138−13	7878	6363	141141
14−2114−21	3030	5656	8686
2222 or more	2020	3535	5555
Total	366366	315315	681681

With this information, construct a table of estimated expected values.

Number of Nights	Pre-retirement	Post-retirement
4−74−7
8−138−13
14−2114−21
2222 or more

Now, with that information, determine whether the length of stay is independent of retirement using α=0.01α=0.01.

(a) Find test value χ2=χ2=

(b) Find the degrees of freedom:

(c) Find the critical value:  

(d) The final conclusion is

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.
B. There is not sufficient evidence to reject the null hypothesis that the length of stay is independent of retirement.

Answer 1

Option A is correct.

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