How can I curve fit data to find a gaussian function?

I have a chart with the next information: class interval, class midpoint,frequency, and relative frequency. With the data in the chart I need to find a gaussian function for curve fitting those data, and to find the covariance and the mean. How can I do that?

Thanks.

Answer 1

[Walter Roberson]

If there is non-zero covariance in your data, then it is not generated by a gaussian function.