Statistics: Confidence Intervals – #29336


Question: The mean weight of 25 randomly selected newborn babies at a local hospital was found to be 7.30 lbs. and the standard deviation was found to be 0.75 lbs. If the weights of newborn babies is approximately normally distributed (20 points)

A) Find a 95% confident interval for the average weight of all newborn babies at this hospital

B) If you increase the sample size, will the confident interval estimate be wider or narrower ?

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