The weights of 4-month-old pigs are known to be normally distributed with standard deviation 4 kg. A


Question: The weights of 4-month-old pigs are known to be normally distributed with standard deviation 4 kg. A new diet is suggested and a sample of 25 pigs given this new diet have an average weight of 30.42 kg. Determine a 99% confidence interval for the mean weight of 4-month-old pigs that are fed this diet.

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