Stats 10 Quiz #6b

# Stats 10 Quiz #6b - 1 We read that the average weight for...

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1. We read that the average weight for babies born in the United States is 7.5 pounds with deviation of 0.25 pound. We can assume that birth weights are nearly normal. If we select one baby at random, what are the chances that the baby weighs 8 or more pounds? a. Normal Model is appropriate with N(7.50, 0.25, X) and P(X > 8) = 0.0228 b. Sampling Distribution Model is appropriate with N(7.50, 0.25/root(n), Y-bar) 2. We read that the average weight for babies born in the United States is 7.5 pounds with deviation of 0.25 pound. We can assume that birth weights are nearly normal. If we select a random sample of five babies, what are the chances that the average of the 5 weights is 8 or more pounds? a. Normal Model is appropriate. N(7.50, 0.25, X) and P(X > 8) = 0.0228 b. Sampling Distribution Model is appropriate with N(7.50, 0.25/root(5), Y-bar) and P(Y-bar >8) = 0 3. A particular psychological test is used to measure academic motivation. The average test score for all female college students nation-wide is 115. A large university estimates that the mean test score for female students on its campus by constructing a confidence interval based on their scores. Which of the following statements about confidence intervals are true? I. The resulting interval will contain 115.

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Stats 10 Quiz #6b - 1 We read that the average weight for...

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