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5. A sample size of 9 balls is being used as the soccer ball manufacturer wants to estimate the mean difference in weight of soccer

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5. A sample size of 9 balls is being used as the soccer ball manufacturer wants to estimate the mean difference in weight of soccer balls. Using a 99% confidence interval. use this information to find the population variance and standard deviation o and o' 16, 14, 20, 14 , 13, 12, 13, 15, 17

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