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The distribution of newborn Golden Retriever puppy weights is known to be approximately normal. Twenty-four newborn...

The distribution of newborn Golden Retriever puppy weights is known to be approximately normal. Twenty-four newborn retriever pups were weighed. The sample mean was 389.4 grams. The sample standard deviation was 19.3 grams.

a) Construct a 90% confidence interval for the mean weight of newborn Golden Retriever puppies. Write a complete sentence describing the meaning of this confidence interval.

b) What happens to the confidence interval if the sample size increases to 30 pups? Explain.

Math   Statistics-And-Probability   
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