A function is a pre-defined formula that is built into the spreadsheet program and can be used as a formula or as part of a formula. There are many such functions, the most commonly used one being the SUM function, which allows you to quickly add up values in a range of cells. To add all the values from all the cells from cell A1 to A15 would be done with the SUM function in a formula like this:
=SUM(A1:A15)
See related links for more information.
The MODE function.
There is no step function in Excel. However, you can use excel to create a Step Function Chart. See related links for a video to explain the process.
Use the STDEV() function.
you can get help in the Microsoft excel itself by pressing F1 key.
MS Excel icons just search on google for answers
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Microsoft Excel has a help function built into it that will search through a pre-installed FAQ to help find an answer. If you cannot find an answer there Microsoft support can answer any question you have.
Microsoft excel was created by Microsoft
Programs->Microsoft Office->Microsoft Excel
Try looking at SEARCH or INDEX in the help file.
None
I believe the only Microsoft program used to create spreadsheets is Microsoft Excel.