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

Name What is done Example

COUNT Counts how many numbers

=COUNT(B2:B10)

COUNTA Counts how many values (numbers or text)

=COUNTA(C1:C100)

COUNTBLANK Counts how many empty cells

=COUNTBLANK(A1:A10)

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COUNTIF-functionA B

Name Absent

Janet 7

Anthony  

Lebo 5

Katlego  

Pat 4

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

Name What is done Example

LARGE Determines a certain largest number e.g. the 2nd largest, or the 3rd largest

=LARGE(A2:A30, 2)

=LARGE(A5:A15, 3)

SMALL Determines 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?

=IF(D2 > 5, “BonusBonus”, “No BonusNo Bonus”)

Condition’s answer is always TRUE or

FALSE

TRUETRUE

Writes this value in the cell.

FALSEFALSE

Writes this value in the cell.

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I can . . . .I can . . . .

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