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A random sample of 31 recent birth records at a large hospital was selected. The mean birth weight was 122.5 ounces with a standard deviation

A random sample of 31 recent birth records at a large hospital was selected. The mean birth weight was 122.5 ounces with a standard deviation of 7.8 ounces.An 99% confidence interval for the population mean birth weight in this hospital is________.

Answer options:

a. 118.65< <126.35

b. 118.89< <126.11

c. 120.20< <124.80

d. 116.32< <129.35

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