HW8.docx - HW8 Cordell Jones 1(10 pts A manufacturer has...

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HW8 Cordell Jones 1. (10 pts) A manufacturer has developed a new powder, which was tested in eight shells the resulting muzzle velocities, in feet per second, were as follows: 3005, 2925, 2935, 2965, 2995, 3005, 2937, 2905. Find a 95% confidence interval for the true average velocity for shells of this type. Assume that muzzle velocities are approximately normally distributed. n 2905 ) )
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HW8 Cordell Jones ## [1] "( 2926.32024266334 , 2991.67975733666 )" t.test (V) ## ## One Sample t-test ## ## data: V ## t = 214.11, df = 7, p-value = 1.28e-14 ## alternative hypothesis: true mean is not equal to 0 ## 95 percent confidence interval: ## 2926.32 2991.68 ## sample estimates: ## mean of x ## 2959 2. (10 pts) Consider the Pima Indian Diabetes Data Find a 98% confidence interval for the difference in actual average Glucose levels for the diabetic and non-diabetic women.

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