You identify data ranges in Excel by locating the cells in the top left and bottom right corners of the range.
EXAMPLE:
You have a data range in columns E, F, G, H, I , and J, including rows 1-23. You would identify this range as E1:J23(the colon indicates to use every cell between the two end points).
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Use =PERCENTILE(range,0.85) where range is the data that you want to analyse.
Data Range is the values of the data from the minimum to the maximum that you are sampling. For plotting purposes(such as in EXCEL spreadsheet), it is the minimum and Maximum range of the values of X-Axis and Y-Axis.
If your data range is a1:a10 then the interquantile range equation is =percentile(a1:a10,0.75)-percentile(a1:a10,0.25)
Here's how you do it in Excel: use the function =STDEV(<range with data>). That function calculates standard deviation for a sample.
You do not convert any data in Excel. A table is a layout to organize the data. If you want the data to look like it is in a table, then move the data to where you would like it to display.