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The weights of a newborn children in the United States vary according to the Normal distribution...

The weights of a newborn children in the United States vary according to the Normal distribution with mean 7.5 pounds and standard deviation 1.25 pounds. The government classifies a newborn as having low birth weight if the weight is less than 5.5 pounds. A study of learning early childhood chooses an SRS of 3 children.

1. Is it okay to use normal calculations for this problem? explain

2. Describe the sampling distribution

3. What is the probability that the mean birth weight of an SRS of 3 children is less than 5.5 pounds? Draw and shade the appropriate normal curve and find the probability. You must find a z-score and write a conclusion in context.

Math   Statistics-And-Probability   
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