Theme 3: Data Dynamics Topic 18: Analyse data using Excel Chapter 3.3. Page 185 – 199 Analysing spreadsheet data

Excel can be used to analyse data

Functions that can count NameWhat is doneExample COUNTCounts how many numbers =COUNT(B2:B10) COUNTACounts how many values (numbers or text) =COUNTA(C1:C100) COUNTBLANKCounts how many empty cells =COUNTBLANK(A1:A10)

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COUNTIF-function AB NameAbsent Janet7 Anthony Lebo5 Katlego Pat4 Number never absent=COUNTBLANK(B2:B6) Number more than 5 days absent=COUNTIF(B2:B6,">5")

Examples of COUNTIF Contains the value 100 =COUNTIF(A2:A10,100) Contains the symbol A. =COUNTIF(C3:C10,”A”) Contains value more than 80 =COUNTIF(D2:D15,”>80”) Contains the same value as in A1 =COUNTIF(B4:B14,A1) Values greater than or equal to 70 =COUNTIF(B4:B14,”>=70”)

HELP Find all the different comparison operators in the Help facilities Possible cue words: –Operators –Types of operators –Comparison operators

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LARGE and SMALL NameWhat is doneExample LARGEDetermines a certain largest number e.g. the 2nd largest, or the 3rd largest =LARGE(A2:A30, 2) =LARGE(A5:A15, 3) SMALLDetermines a certain smallest number e.g. the 2nd smallest, or the 3rd smallest. =SMALL(A2:A30, 2) =SMALL(A5:A15, 3)

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Sum of certain cells =SUMIF(range, criteria, sum_range) What are the cells that must be tested? What are the criteria that values in cells must comply with? Which values must be added to the total if the criteria are met?

Example of SUMIF =SUMIF(B2:B6, 11, C2:C6) Look at the cells B2:B6 If the value is equal to 11.. Add the value in the corresponding cell in column C to the total. Total = C2 + C4 + C5 =R20 + R10 + R15 =R45

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The IF function Allocates a value to a cell depending on the condition(s) specified. Example: Give bonus to employees who have worked more than 5 years.

How does the IF function work? BonusNo Bonus =IF(D2 > 5, “Bonus”, “No Bonus”) Condition’s answer is always TRUE or FALSE TRUE Writes this value in the cell. FALSE

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