Antonio measures the alcohol content of whiskey for his Chemistry 101 lab. He actually measures the...
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Antonio measures the alcohol content of whiskey for his Chemistry 101 lab. He actually measures the mass of 6.6 milliliters of whiskey -- a chemical calculation then finds the percent alcohol from the mass. The standard deviation of students' measurements of mass is o = 10 milligrams (mg). Antonio repeats the measurement 4 times and records the mean x of his 4 measurements. (a) ox of Antonio's mean result? (b) How many times must Antonio repeat the measurement to reduce the standard deviation of x to 2.04 mg? Antonio measures the alcohol content of whiskey for his Chemistry 101 lab. He actually measures the mass of 6.6 milliliters of whiskey -- a chemical calculation then finds the percent alcohol from the mass. The standard deviation of students' measurements of mass is o = 10 milligrams (mg). Antonio repeats the measurement 4 times and records the mean x of his 4 measurements. (a) ox of Antonio's mean result? (b) How many times must Antonio repeat the measurement to reduce the standard deviation of x to 2.04 mg?
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