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Anne is interested in estimating the population mean fat content of snack foods (as a percentage). She knows from federal authorities that the population standard

Anne is interested in estimating the population mean fat content of snack foods (as a percentage). She knows from federal authorities that the population standard deviation is 15. She samples four snack foods at her local supermarket, and the fat content of each is 60, 30, 50, and 40. Within which scores can Anne be 99% confident that the mean lies?

a. 30.3 to 59.7

b. 25.7 to 64.3

c. 24.3 to 65.7

d. 7.53 to 82.47

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