Statistical Sciences 2035 Chapter Notes -Coefficient Of Variation, Interval Estimation, Standard Deviation

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If the population distribution is bell-shaped, symmetrical with a single peak, with mean and standard deviation , then. 68. 26% of all population units are within (plus or minus) one standard deviation of the mean and thus lie in the interval [ , + ] 95. 44% of all population units are within (plus or minus) two standard deviations of the mean and thus lie in the interval [ 2 , + 2 ] 99. 73% of all population units are within (plus or minus) three standard deviations of the mean and thus lie in the interval [ 3 , + 3 ] 2. 79, 3. 74, 5. 29, 6. 84, 8. 39, 11. 39 (values from left to right: solve for what you are being asked using the empirical rule. An interval that contains a specified percentage of the individual measurements in a population is called a tolerance interval.

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