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A ramdon of 30 birth records from a local hospital were slected. Assume that the distrubition birth weights is normally distributed. In a sample average birth weight was 123 ounces with a standard deviation of 7.5 ounces.
Calculate the 99% confidence interval for the unknown parameter the mean birth weight for all babies in that hospital. Report the upper and lower limit of the interval.
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What is the degree of freedom?
Write the formula for solving the for the Estimation (E)?
Calculate the upper and lower limits of the confidence level
Upper =Lower =
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