why is necessary to auto-save
Alt + +
The sum of standard deviations from the mean is the error.
sum mean to add and differene mean to subtrat
Alt+=
auto sum
what is sum? sum means like total of the #
Sum is an answer to an addition problem.
The sum of total deviations about the mean is the total variance. * * * * * No it is not - that is the sum of their SQUARES. The sum of the deviations is always zero.
Yes, you can do that. If you have a series of columns, you can highlight all of the column to select the range. When you click on the auto-sum button, Excel will insert =SUM(XX:XX) at the bottom of each column in the range.
The mean of a series is equal to the sum divided by the number of items in the series. So, mean = sum/number, which means the sum is equal to the mean times the number. In this case, the sum is 3573.
If you have numbers in cells B1 through B134, use the formula: =SUM(B1:B134). You can use auto sum to insert the formula by highlighting the column (you can click on the column letter) and clicking the AutoSum button on the menu.