SOLUTION: For patients who have been given a diabetes test, blood-glucose readings are approximately normally distributed with mean 127 mg/dl and a standard deviation 8 mg/dl. Suppose that a

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Question 1155589: For patients who have been given a diabetes test, blood-glucose readings are approximately normally distributed with mean 127 mg/dl and a standard deviation 8 mg/dl. Suppose that a sample of 4 patients will be selected and the sample mean blood-glucose level will be computed.
According to the empirical rule, in 95 percent of samples the SAMPLE MEAN blood-glucose level will be between the lower-bound of _________ and the upper-bound of _________

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
the standard error is sd/sqrt(n) so here, the sd of the sample mean is 8/sqrt(4)=4
95% of the measurements will be +/- 2 sd or 8 mg/dl away from the mean, so the interval is (119, 135) mg/dl