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A researcher wants to estimate the number of hours that 5-year old children spend watching television. A sample of 50 five-year old children was observed

A researcher wants to estimate the number of hours that 5-year old children spend watching television. A sample of 50 five-year old children was observed to have a mean viewing time of 3 hours. The population is normally distributed with a standard deviation = 0.5 hours,

find: a. The best point estimate of the population mean

b. The 95% confidence interval of the population mean

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