Help l System Announcements Engineers, 6th Edition ProbabiltYfor nment Gradebook

Question

Help l System Announcements Engineers, 6th Edition ProbabiltYfor nment Gradebook PRINTER VERStoN Ten individuals have participated in a diet-modification program to stimula weight loss. Their weights both before and after participation in the program shown in the following list. Is there evidence to sup reduction? Compare the daim that this the weight before to the weight after the diet p diet-modification program is effective in producing mean weight Weight subject Before After 195 214 197 247 221 201 190 187 175 210 197 215 199 246 221 294 310 285 Round your answer to one decimal place (e.g. 95.7). (a) Calculate d L

Explanation / Answer

(a) dbar = 16.7

(b) sd = 6.73

(c) H0 : d =0 and Ha : d > 0

t = dbar / ( sd / n) = 16.7/ (6.73/ 10) = 16.7/ 2.13 = 7.84

Critical value of t0 = 1.833 for dF = 9 and one direction alpha = 0.1

(d) Yes, there is a strong evidence to show that there is a difference in the mean weight before and after the demodification program.

Weight Subject Before After di 1 195 189 6 2 214 197 17 3 247 221 26 4 201 190 11 5 187 175 12 6 210 197 13 7 215 199 16 8 246 221 25 9 294 278 16 10 310 285 25 Average 16.7 Std. Dev. 6.734

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