(Step-by-Step) Birth Weights. A simple random sample of birth weights in the US has a mean of 3433 g. The standard deviation of all birth weights is 495 g. Using


Question: Birth Weights. A simple random sample of birth weights in the US has a mean of 3433 g. The standard deviation of all birth weights is 495 g.

  1. Using a sample size of 75, construct a 95% confidence interval of the mean birth weight in the US.
  2. Using a sample size of 75,000, construct a 95% CI.
  3. Which of the preceding CI is wider?

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