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For a class science project, students worked in groups to make potato-powered batteries. Each of the $8$ groups used a voltmeter to measure the voltage produced by their potatoes:$\newline$$3.6\,\text{volts}, 3.9\,\text{volts}, 3.6\,\text{volts}, 3.6\,\text{volts}, 3.6\,\text{volts}, 3.6\,\text{volts}, 3.7\,\text{volts}, 3.2\,\text{volts}$$\newline$What was the mean voltage?$\newline$$\_\_\_\_\_\,\text{volts}$