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Unformatted text preview: 39. Known that: 6. The population ={calorie reading of all 8 oz servings} The population mean U (i.e., the average calorie reading of all 8 oz servings) us unknown. 7. Sample size, n=31 Sample={x, x1, x2, x3, …} 8. Sample mean X_=99.3 9. sample standard deviation, s=41 (X1x_)^2+(X2x_)^2….(X40x_)^2/401 10. Confidence level is 1o=0.90 and 0.95 The 90% confidence interval for the unknown population mean U (the unknown average calorie reading of all 8 oz servings) is given by: 99.3+(Z0.1/2)*41.5/sqrt31 99.3+(1.645)41.5/5.567 99.3+12.263 87.037, 111.563 we’re 90% confident that the unkown populaton U (the unknown average calorie reading of all 8 oz servings) lies betweem 87.037 & 111.563 38. 90% 21.99,24.41 95% 21.76, 24.64 46. 99% 97.79, 116.31...
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 Fall '10
 Zhang
 Business, Statistics, Standard Deviation, average repair cost

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