I need to find the mean and standard deviation from a frequency table using my graphing calculator (Texas Instruments TI-83 Plus). I have entered the correct data for L1 and L2 but am having problems with coming to the same answers given to me.

The data I have to enter is:

Computers Sold (L1): 0, 1, 2, 3, 4, 5

Frequency (L2): 4, 2, 1, 0, 2, 1

So after entering these into L1 and L2, I hit 2nd --> Quit to return to main screen. Then, my notes tell me to press the following:

STAT --> CALC --> 1-Var Stats --> ENTER --> 2nd --> LIST --> L1 --> ENTER --> Comma --> ENTER --> 2nd --> List --> L2 --> ENTER

However, I get an error (syntax) after hitting Comma --> ENTER.

Based on the provided answers, the mean should be 1.7 and the SD should be 1.85. So my question is what is the correct sequence of steps?