Answer:
Press the "STAT" button (or equivalent) on the calculator.
Choose "1:Edit" to enter data.
Enter the data values one by one (in this case, enter 9, then press enter; enter 13, then press enter; and so on).
After entering all the data, choose "2:Quit" to exit the data entry mode.
To find the various statistics, choose the appropriate function from the calculator's menu. For example, to find the mean, choose "1:Stat Calc," then "1:1-Var Stats," and then choose the list that contains the data (in this case, it's the only list, so just press enter). The calculator will then display the mean (12.9), as well as other statistics.
Explanation: