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EC315 Chap 12 Help

# EC315 Chap 12 Help - The output from a statistical software...

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Hypothesis Test: Independent Groups (t-test, pooled variance) Line B Line C 43.33333 41.5 mean 0.8164967851 0.8366600265 std. dev. 6 6 n df 10 difference (Line B - Line C) 1.8333300 pooled variance 0.6833335 pooled std. dev. 0.8266399 standard error of difference 0.4772608 hypothesized difference 0 t 3.84 p-value (two-tailed) .0033 confidence interval 99.% lower 0.3207605 confidence interval 99.% upper 3.3458995 half-width 1.5125695

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28. Three assembly lines are used to produce a certain component for an airliner. To examine the production rate, a random sample of six hourly periods is chosen for each assembly line and the number of components produced during these periods for each line is recorded.
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Unformatted text preview: The output from a statistical software package is Summary Group Count Sum Average Variance Line A 6 250 41.66667 0.266667 Line B 6 260 43.33333 0.666667 Line C 6 249 41.5 0.7 ANOVA Source of Variation SS df MS F p-value Between Groups 12.33333 2 6.166667 11.32653 0.001005 Within Groups 8.166667 15 0.544444 Total 20.5 17 a. Develop a 99 percent confidence interval for the difference in the means between Line B and Line C. Line B Line C Mean 43.3333 41.5000 Standard Deviation 0.8165 0.8367 N 6 6 See the MegaStat Sheet The 99% CI is [0.3208, 3.3459]...
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