COLLECTING DATA IN REAL LIFE

KEY VOCABULARYKEY VOCABULARYLet´s listen to this song and watch the video.

http://www.youtube.com/watch?v=uydzT_WiRz4

MeanMean - The total divided by how many

MedianMedian - The middle number in size order

ModeMode - The most common one.

RangeRange - How far apart your values are.

LET´S PRACTICE TOGETHER HOW TO GE THE MEAN...

Let´s keep it up!!! NOW TRY THE MEDIAN...

THE MEDIAN WITH AN EVEN NUMBER OF DATA VALUES...

THE MEDIAN WITH AN EVEN NUMBER OF DATA VALUES..

PRACTICING THE MODE...

LOOK AT ONE MORE...

MEAN MEAN - The total divided by how many

5 children’s heights are 132cm, 142cm, 118cm, 120cm, and 118cm

What is the MEANMEAN?

MeanMean = 132 + 142 + 118 + 120 + 118 = 132 + 142 + 118 + 120 + 118 =

55

MeanMean = 630 = 126

5

EXAMPLES APPLYING THE CONCEPTS EXAMPLES APPLYING THE CONCEPTS LEARNT IN THE VOCABULARYLEARNT IN THE VOCABULARY

MedianMedian - The middle number in size order

5 children’s heights are 132cm, 141cm, 118cm, 120cm, and 118cm

DON´T FORGET TO ORDER THE DON´T FORGET TO ORDER THE INFORMATION INFORMATION

FROM FROM SMALLEST TO BIGGESTSMALLEST TO BIGGEST

What is the MEDIANMEDIAN?118cm, 118cm, 120cm120cm, 132cm, and 141cm

ModeMode - The most common one.

5 children’s heights are 132cm, 141cm, 118cm, 120cm, and 118cm

What is the MODEMODE?132cm, 141cm, 118cm118cm, 120cm, and 118118cm

So, the most common number (MODE) (MODE) or the value that is more times repeated here is 118.

RangeRange - How far apart your values are

5 children’s heights are 132cm, 141cm, 118cm, 120cm, and 118cm

What is the RANGE? Biggest = 141cmSmallest = 118cm

Here you can do a normal substraction to get the RANGERANGE...

Biggest- Smallest Biggest- Smallest so, 141 and 118 are 23 apart.141 and 118 are 23 apart.