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Practice final-421-solutions

# Practice final-421-solutions - 29 8531 1469 1 5 3 5 1 200 2...

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Solution to 1b should be 0.97

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b) t=0.0159, the table gives only that Confidence level<50%. Minitab gives that confidence level is approximately 1.1924%. 7. (a) x = the weight of a bag of fertilizer μ = 50 lbs σ = 2 lb n = 200 ( 29 ( 29 ( 29 ( 29 9876 . 0062 . 9938 . 5 . 2 5 . 2 5 . 2 5 . 2 200 2 50 25 . 50 200 2 50 75 . 49 25 . 50 75 . 49 = - = - - = - = - - z P z P z P z P x P (b) μ = 49.9 lbs σ = 2 lb n = 200

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Unformatted text preview: 29 8531 . 1469 . 1 ) 5 . 3 5 . 1 ( 200 2 9 . 49 25 . 50 200 2 9 . 49 75 . 49 25 . 50 75 . 49 =-= ≤ ≤-= -≤ ≤-= ≤ ≤ z P z P x P Sample size 25 question part a. rejection region should be to the right of 2.064 and to the left of -2.064....
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Practice final-421-solutions - 29 8531 1469 1 5 3 5 1 200 2...

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