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Problem 7
6.2 Using the Central Limit Theorem
It is recommended that backpacks weigh less than 1/4th of your body weight. The average backpack with four textbooks and school supplies weighs 38.2 pounds with a standard deviation 7.1 pounds. If a randomly selected group of 36 backpacks is weighed what is the probability that the average weight for the packs is between 40 and 41 pounds?
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