Measure Of Central TendencyMean, Median, Mode

By Group 4

Group 4 I Gede Darwin Atma Winarta Ilham Rahman Arifin Jonathan Osa Pratama Kautsar Irnando Rizky Syarif Lubis

DefinitionMeanMeansAverage

DefinitionMean the average of a group of numbers.

2, 5, 2, 1, 5Mean = 3

Mean is found by evening out the numbers2, 5, 2, 1, 5

Mean is found by evening out the numbers2, 5, 2, 1, 5

mean = 3

How to Find the Mean of a Group of NumbersStep 1 Add all the numbers.

8, 10, 12, 18, 22, 268+10+12+18+22+26 = 96

How to Find the Mean of a Group of NumbersStep 2 Divide the sum by the number of addends.

8, 10, 12, 18, 22, 268+10+12+18+22+26 = 96 How many addends are there?

How to Find the Mean of a Group of NumbersStep 2 Divide the sum by the number of addends.

6)96sum# of addends1636663

How to Find the Mean of a Group of NumbersThe mean or average of these numbers is 16.8, 10, 12, 18, 22, 26

What is the mean of these numbers?7, 10, 16 11

What is the mean of these numbers?1, 2, 7, 11, 198

DefinitionMedianis in theMiddle

DefinitionMedian the middle number in a set of ordered numbers.

1, 3, 7, 10, 13Median = 7

How to Find the Median in a Group of NumbersStep 1 Arrange the numbers in order from least to greatest.

21, 18, 24, 19, 27 18, 19, 21, 24, 27

How to Find the Median in a Group of NumbersStep 2 Find the middle number.

21, 18, 24, 19, 27 18, 19, 21, 24, 27

How to Find the Median in a Group of NumbersStep 2 Find the middle number.

18, 19, 21, 24, 27

This is your median number.

How to Find the Median in a Group of NumbersStep 3 If there are two middle numbers, find the mean of these two numbers.

18, 19, 21, 25, 27, 28

How to Find the Median in a Group of NumbersStep 3 If there are two middle numbers, find the mean of these two numbers.

21+ 25 =

46 2)46 23median

What is the median of these numbers?16, 10, 7 107, 10, 16

What is the median of these numbers?53, 5, 81, 67, 25, 78 60

53 + 67 = 1202)1205, 25, 53, 67, 78, 81

DefinitionModeis the mostPopular

DefinitionMode the number that appears most frequently in a set of numbers.

1, 1, 3, 7, 10, 13Mode = 1

Central Tendency Measurement For Grouped Data

MeanNote:Xi=midpoint of interval classFi=frequency of Xik=number of interval class

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MedianWith:TKb=side below a median classn=data sizeFk=cumulative frequency prior to median classF0=frequency of median classc=length of class

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ModeNote :TKb=below side of mode classd1=difference frequency between mode and previous oned2=difference frequency between mode and next oneci=length of class

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Any Questions ?

Sessions 1

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