A statistician employed by a consumer testing organization reports that at 95% confidence he has determined that the true average content of the Uncola soft drinks is between 11.7 to 12.3 ounces. He further reports that his sample revealed an average content of 12 ounces, but he forgot to report the size of the sample he had selected. Assuming the standard deviation of the population is known to be 1.28, determine the size of the sample.

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SMALL SAMPLE LEVEL OF CONFIDENCE NORMAL POPULATION DISTRIBUTION Xbar Sample mean 12 Ma... View the full answer