software

STDEV() returns 1 sigma answer which represents 68% of the data.
How do I get STDEV() 2 sigma which represents 95% of the data?stdev times 2 = 2 (4sigma)

I have a column of dates. I want to count the number of dates that are six
months or less from today. Any help would be appreciated.

I have a master or primary spreadsheet lising purchase orders along with many
details of the POs. This master spreadsheet is used by our manufacturing

Colum D has start date and colum E has end date colum G has unique records
(1,0)

I need to average only the last 30 entrys in a column of data automatically.
Any suggestion will be appreciated.

I am having the following problem i have text that was entered into an excel
speadsheet that now has been converted into a picture. I need to know how i

How??? How do I extend to a second sheet?????

How can I change the header data on all worksheets at once?

Thanks for the response.

I am having two sorts of Values one in USD while another in Euro....