# Juan makes a measurement in a chemistry laboratory and records the result in his lab report.

Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The standard deviation of students lab measurements is $\sigma =8$ milligrams. Juan repeats the measurement 2 times and records the mean x of his 2 measurements. What is the standard deviation of Juan's mean result?

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Step 1
The standard deviation of students lab measurements is 8.
Juan repeats the measurement 2 times. That is $n=2$
Step 2
The standard deviation of Juans