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

2. Excel can be used to analyse data

3. 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)

4. Activity 1 Page 186 Explore

5. Activity 2 Page 187 Try it yourself

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7. 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")

8. 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”)

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

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12. 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)

13. Activity 6 Page 190 Try it yourself

14. Activity 7 Page 191 Apply

15. 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?

16. 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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19. 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.

20. 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

21. Activity 10 Page 194 Check if you understand

22. Activity 11 Page 195 Explore

23. Activity 12 Page 195 Try it yourself

24. Activity 13 Page 195 Apply

25. Activity 14 Page 196 Checklist  I can....

26. Activity 15 Page 197 Check if you understand