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An SRS of 400 high school seniors gained an average of x=20.69 points in their second attempt at the SAT Mathematics exam. Assume that the
An SRS of 400 high school seniors gained an average of x=20.69 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation =52.73. We want to estimate the mean change in score in the population of all high school seniors. Using the 68 - 95- 99.7 Rule or the z-table , give a 68% confidence interval(a , b) for based on this sample
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Calculus Single And Multivariable
Authors: Deborah Hughes Hallett, Andrew M Gleason, William G McCallum, Daniel E Flath, Patti Frazer Lock, Sheldon P Gordon, David O Lomen, David Lovelock, Brad
6th Edition
1118475712, 9781118475713
