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1. In a random sample of 50 kindergarten children, there are 7 who hold crayons in their left hands while coloring a picture.

a. Give the best point estimate of the proportion of left-handed kindergarten children.

b. Explain what "best" means in this exercise.

2. Selected at random, 125 schoolchildren are given their choice of candy made with either light or dark chocolate, but otherwise the candy is the same. Only 30% of them choose the dark chocolate. If a candy maker wants no more than a 1 in 100 chance of being misled by sampling variability, what is the estimate of the proportion of children who prefer dark chocolate?

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