Suppose that the distribution of weights of New Zealand ham- sters is distributed normally with a mean of 63.5 grams and a standard deviation of 12.2 grams. 1. How would you characterize the smallest and the largest 5% of all weights? 2. If there are 1000 hamsters in the population, how many weigh at least 78 grams? 3. If 3 hamsters are selected at random, what is the probability that all of them weigh more than 65 grams?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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  1. Suppose that the distribution of weights of New Zealand ham- sters is distributed normally with a mean of 63.5 grams and a standard deviation of 12.2 grams.

1. How would you characterize the smallest and the largest 5% of all weights?

2. If there are 1000 hamsters in the population, how many weigh at least 78 grams?

3. If 3 hamsters are selected at random, what is the probability that all of them weigh more than 65 grams?

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