Sampling Distributions

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Presentation transcript:

Sampling Distributions

Yogurt Dannon is supposed to put 29.6 grams of fruit in their fruit-flavored yogurt. The company claims the standard deviation for the yogurt process is 2.8grams. We took a sample of 31 containers to check for quality. What’s the probability that we found the average of those containers to be less than 28.9grams?

Boys and Girls Assuming that boys and girls are equally likely, estimate the probability of getting more than 36 girls in 64 births.

Women’s Height We know that women’s heights are normally distributed with a mean of 63.6 inches and a standard deviation given by σ = 2.5in. If 36 women are randomly selected, find the probability that they have a mean height less than 64in.

Voter’s Lying??? In a survey of 1002 people, 701 said that they voted in a recent presidential election (based on data from ICR Research Group). Voting records show that 61% of eligible voters actually did vote. Given that 61% of eligible voters actually did vote, find the probability that among 1002 randomly selected eligible voters, at least 701 actually did vote.

I’ll add the solutions later this evening!!!!