Historians believe that the Shang dynasty was founded by a rebel, now known as King Tang, who in 1766 BC overthrew the leader of the Xia Dynasty, Jie.
The first step is gather the data you want to base the confidence calculation into an excel spread sheet. Put them all in a column and use the COUNT function to determine the number of data points you want to base you calculation on.In this case, there are 20 data points and the value of the count calculation is 20. Calculate the standard deviation of the data.The standard deviation is used to measure the variability of a data set and it is a key value of the confidence calculation. In Excel, this is done with the STDEV function.he first step is gather the data you want to base the confidence calculation into an excel spread sheet. Put them all in a column and use the COUNT function to determine the number of data points you want to base you calculation on.
In the example above, the date and time in cell B1 is internally represented by the number, 40562.875 and the date and time in cell B2 is internally represented by the number 40564.625. Subtracting these two numbers gives the result 1.75 which is Excel's internal representation for 42 hours 0 minutes.ell B3 of the following spreadsheet shows a simple example of how to calculate a time difference in Excel. The calculation simply subtracts the time in cell B1 from the time in cell B2.