Dice. When one die is rolled, the number of spots show-ing has a mean of 3.5 and a standard deviation of 1.7. Suppose you roll 10 dice. What’s the approximate prob-ability that your total is between 30 and 40 (that is, the average for the 10 dice is between 3 and 4)? Specify themodel you use and the assumptions and conditions thatjustify your approach.

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Dice. When one die is rolled, the number of spots show-
ing has a mean of 3.5 and a standard deviation of 1.7.
Suppose you roll 10 dice. What’s the approximate prob-
ability that your total is between 30 and 40 (that is, the
average for the 10 dice is between 3 and 4)? Specify the
model you use and the assumptions and conditions that
justify your approach.
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