The NORMDIST function in Excel is a powerful tool for calculating the normal distribution of your data. This function takes two parameters - the mean (m) and the standard deviation (s) - and returns the probability that a random variable falls within a certain range.

This function can be used to determine the probability of an event occurring, or to compare observed data with theoretical data. For example, if you have a dataset of test scores and you want to determine the probability of a student scoring above a certain threshold, you can use this function to calculate the normal distribution.

So how do you calculate the normal distribution of your data? First, you need to find out the mean (m) and standard deviation (s) of your dataset. You can use the AVERAGE and STDEV functions in Excel to easily calculate these values. Next, you need to enter the mean and standard deviation into the NORMDIST function as parameters. Finally, specify the range of values that you want to calculate the probability for, and click "Calculate."

The NORMDIST function can also be used to compare observed data with theoretical data. For example, if you have a dataset of test scores and you want to compare the actual performance with the expected performance, you can use this function to calculate the probability of the observed data falling within the expected range.

In conclusion, the NORMDIST function in Excel is a powerful tool for determining the normal distribution of your data. By understanding how to use this function, you'll be able to calculate the probability of an event occurring or compare observed data with theoretical data.