BME423HW3

BME423HW3 - Homework #3 Key BME 423 Fall 2004 1. (15...

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Homework #3 Key BME 423 Fall 2004 1. (15 points) 38.54 15.79 15.79 5.968 7 71 6 for =0.05, 2.447 38.5 4 2.44 7 5.96 8 38.5 4 2.44 7 5.968 23.936 3 53.1437 X X X XX X s s s n t X t s X ts a aa na m m m = = = == =- - <<+ < <+× << The 95% confidence interval for the population mean value of Pimax in kyphoscoliosis is 23.9363 to 53.1437 (cm H 2 O).
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2 2. (15 points) ( 29 2 22 7.9 15.2 5.2 4.4 1 ( ) 23.2 2 23. 2 23.2 1.5627 1 9 19 1 9 1 92 36 for =0.05, 2.028 pr o pla pr o pla pl a pro pr o pla XX pl a pro pl a pro X ss s ss s nn t ts a a na - == = += = + = += =+ - -- ( 29 ( 29 ( 29 7. 9 15. 2 2.02 8 1.562 7 7. 9 15. 2 2.02 8 1.5627 10.469 2 4.1308 pl a pr o pl a pro pl a pr o a pro X pl a pro pl a pro a mm <-<-+ × <-<-+× - <- The 95% confidence interval for the difference in the mean duration of labor in women treated with prostaglandin E 2 gel compared with women treated with placebo gel is -10.4692 to -4.1308 hours. So the difference is statistically significant with P<0.05, because 0 is not included in the confidence interval.
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3 3. (30 points) a) ( 29( 29 ( 29( 29 ( 29 ( 29 ( 29 ( 29( 29 ( 29 2 2 2 2 2 2 3.0930 3.2335 277 7759 253 7093 25 3 775 9 27 7 7093 2.0139 1 0 775 9 277 XY ss XX Y XY Y X X XY a n n X Y b n == - × -× = = =- ×- - - = - ∑∑ ∑ ∑∑ ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 2 2 2 2 2 22 2 2 2 1 0 709 3 27 7 253 0.9861 1 0 775 9 277
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This note was uploaded on 03/02/2008 for the course BME 423 taught by Professor D'argenio during the Fall '06 term at USC.

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BME423HW3 - Homework #3 Key BME 423 Fall 2004 1. (15...

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