5. The standard deviation of the weights of year-old cows is known to be 80 pounds. A scientist is interested in finding a 95% confidence interval for the mean weight of year-old cows. The scientist weighs 52 cows. The sample mean is 1250 pounds and the standard deviation is 78 pounds. a. b. Which distribution do you use to compute a confidence interval? Explain your answer. Compute the confidence interval. Don't forget to show your work.

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A: Mean()=12Standard deviation()=4

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