An important problem in industry is shipment damage. A windshield factory ships its product by truck and determines that it cannot meet its profit expectations if, on average, the number of damaged items per truckload is greater than 12. A random sample of 12 departing truckloads is selected at the delivery point and the average number of damaged items per truckload is calculated to be 11.3 with a calculated sample of variance of 0.49. Select a 99% confidence interval for the true mean of damaged items.

Q: 1: Discuss the steps to conduct a statistical research.

A: There are 7 steps to conduct a statistical research:

Q: Express the confidence interval (180.4,344)(180.4,344) in the form of ¯x±MEx¯±ME.

A: GivenConfidence interval (180.4,344)Upper  limit=344Lower limit=180.4

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A: given data  normal distributionn = 17x¯ = 99.2s = 22.395% ci for μ.

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A: Givensample proportion(p^)=55.8%=0.558Margin of error(E)=±3%=0.03

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Q: Also compute 99% Confidence interval

A: We have, X¯1 = 7.5556,  s1 = 2.2973 , n1 = 9and,X2 = 11.3333, s2 = 2.1794, n1= 9 Also, pooled…

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A:

Q: Use the given information to find the number of degrees of freedom, the critical values X and XR,…

A: given data n = 40s = 65.990% ci for standard deviation.

Q: PROB AND STATS ET-RANGE AND IQR WEEK 6 MR.SAM Below are the ages of 12 students found in the…

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A:

Q: Use the following sample to evaluate H0: μ = 65, at significance level α = 0.05. 53 75 68 53 57 12…

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A:

Q: You are interested in finding a 90% confidence interval for the mean number of visits for physical…

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Q: If n=29, ¯xx¯(x-bar)=34, and s=4, find the margin of error at a 99% confidence level

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Q: Find the mean:  Find the median:  Find the standard deviation:

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Q: Assume that weights of adult females are normally distributed with a mean of 78 kg and a standard…

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Q: With multiple regression, the null hypothesis for the entire model now uses the p test. True False

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Q: Use the data to model deliveries times for a driver based on three parameters. If today's delivery…

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