I have the following math test results:
32 37 50 59 66 67 69 75 80 81 88 90 92 98
How do I find the standard deviation and the variance

If you have a mean of 78, mode of 84, Median of 80 and standard deviation of 11, how do you find the varaince.

The variance is just the standard deviation squared - so in this case, if the standard deviation is 11, the variance is 11^2 or 121.