Computer Assignment 2

Computer Assignment 2 - CI Computer Assignment Krista Pace...

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CI Computer Assignment Krista Pace DSC 205 Ms. Cramer 1. Grapefruit – Minitab a. b. The 95% confidence interval for the grapefruit weights is (0.82670, 0.86164) Variable N Mean StDev SE Mean 95% CI weight 84 0.84417 0.08050 0.00878 (0.82670, 0.86164) c. The 99% confidence interval for the grapefruit weights is (0.82101, 0.86732) Variable N Mean StDev SE Mean 99% CI weight 84 0.84417 0.08050 0.00878 (0.82101, 0.86732) d. The 95% confidence interval for σ - known is (0.82695, 0.86138) The assumed standard deviation = 0.0805 Variable N Mean StDev SE Mean 95% CI weight 84 0.84417 0.08050 0.00878 (0.82695, 0.86138) The calculated confidence interval is narrower than the one with σ - unknown because it does not have to account for possible inaccuracies of an estimated σ .
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2. Batteries – Minitab a. The 95% confidence interval for the battery life in hours is (346.1, 600.8) Variable N Mean StDev SE Mean 95% CI Hours 13 473.5 210.8 58.5 (346.1, 600.8) b. After deleting the outlier, we can be 95% sure that all the battery hour lifetimes will
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Computer Assignment 2 - CI Computer Assignment Krista Pace...

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