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An FDA representative randomly selects 12 packages of ground chuck from a grocery store and measures the fat content (as a percent) of each package. Assume that the fat contents have an approximately normal distribution. The resulting measurements are given below. Fat Contents (%) 11 13 17 15 16 18 18 18 17 16 19 14 Copy Data necessary. Step 2 of 2: Construct a 90 % confidence interval for the true mean fat content of all the packages of ground beef. Round the endpoints to two decimal places, if