mont4e_sm_ch08_sec03 - d) Set the width to 1.5 degrees...

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Section 8-3 8-20 131 . 2 15 , 025 . 0 = t 812 . 1 10 , 05 . 0 = t 325 . 1 20 , 10 . 0 = t 787 . 2 25 , 005 . 0 = t 385 . 3 30 , 001 . 0 = t 8-21 a) b) 179 . 2 12 , 025 . 0 = t 064 . 2 24 , 025 . 0 = t c) 012 . 3 13 , 005 . 0 = t d) 073 . 4 15 , 0005 . 0 = t 8-22 a) b) 761 . 1 14 , 05 . 0 = t 539 . 2 19 , 01 . 0 = t c) 467 . 3 24 , 001 . 0 = t 8-23 95% confidence interval on mean tire life 94 . 3645 7 . 139 , 60 16 = = = s x n 131 . 2 15 , 025 . 0 = t 07 . 62082 33 . 58197 16 94 . 3645 131 . 2 7 . 60139 16 94 . 3645 131 . 2 7 . 60139 15 , 025 . 0 15 , 025 . 0 + + μ n s t x n s t x 8-24 99% lower confidence bound on mean Izod impact strength 25 . 0 25 . 1 20 = = = s x n 539 . 2 19 , 01 . 0 = t 108 . 1 20 25 . 0 539 . 2 25 . 1 19 , 01 . 0 n s t x 8-6
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8-25 x = 1.10 s = 0.015 n = 25 95% CI on the mean volume of syrup dispensed For α = 0.05 and n = 25, t α /2,n-1 = t 0.025,24 = 2.064 106 . 1 1.094 25 015 . 0 064 . 2 10 . 1 25 015 . 0 064 . 2 10 . 1 24 , 025 . 0 24 , 025 . 0 + + μ n s t x n s t x 8-26 95% confidence interval on mean peak power 16 315 7 = = = s x n 447 . 2 6 , 025 . 0 = t 798 . 329 202 . 300 7 315 447 . 2 315 7 16 447 . 2 315 6 , 025 . 0 6 , 025 . 0 + + n s t x n s t x 8-27 99% upper confidence interval on mean SBP 9 . 9 3 . 118 14 = = = s x n 650 . 2 13 , 01 . 0 = t 312 . 125 14 9 . 9 650 . 2 3 . 118 13 , 005 . 0 + + n s t x 8-28 90% CI on the mean frequency of a beam subjected to loads 132 . 2 5, n 1.53, s 231.67, 4 , 05 . 1 - n /2, = = = = = t t x α 1 . 233 230.2 5 53 . 1 132 . 2 67 . 231 5 53 . 1 132 . 2 67 . 231 4 , 05 . 0 4 , 05 . 0 + n s t x n s t x 8-7
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By examining the normal probability plot, it appears that the data are normally distributed. There does not appear to be enough evidence to reject the hypothesis that the frequencies are normally distributed.
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mont4e_sm_ch08_sec03 - d) Set the width to 1.5 degrees...

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