Diagnostic daytime multiple sleep latency test (MSLT) is used to diagnose narcolepsy and to measure the degree of daytime sleepiness. It measures how quickly you fall asleep in quiet situations during the day. It also monitors how quickly and how often you enter REM sleep.
Array formulas provide a way by which Excel users can discover such useful information. To explain the power of array formulas I'll use this database. It shows sales by Seller, Product, Region, and Customer, with Quantity and Total Sales, in dollars. I named each column of data with the label shown in row 1.
Why Use Microsoft Excel. Microsoft Excel is spreadsheet software used to calculate financial, statistical and engineering information, and is used in a wide range of places, from individual households to Fortune 500 companies.The components of Excel are cells, spreadsheets and workbooks. Workbooks contain spreadsheets and spreadsheets contain cells.