WALT calculate the mean, median, mode and range for a set of data.

TASK Elly and Troy want to find out once and for all:

- which Activity Group has the overall best score, (mean)
- which Activity Group has the highest middle number, (median)
- what score was the most common, (mode)
- which activity group has the highest range. (range)

In everyday life people collect data to look for trends and make decisions. In order to analyse the information, we need to understand the different ways tolOOK at the data.

Success Criteria you will know you are successful when:

- calculate the mean by adding up all the data (9 + 4 + 4 + 5 + 8 = 30) then divide thetotal by how many numbers there were (9, 4, 4, 5, 8 = 5 numbers so 30 ÷ 5 = 6).
- calculate the median by ordering all numbers from smallest to biggest then selecting the middle number (4, 4, 5, 8, 9 = 5 is the middle number). If there are 6 numbers e.g. 4, 4, 5, 6, 8, 9, then the median is halfway = 5.5.
- calculate the mode by identifying which number occurs most often (4, 4, 5, 8, 9 = 4 because there are two of them). You can have more than one mode.
- calculate the range by finding the difference between the highest and lowest numbers (9 - 4 = 5).

Data: 4,14,18

The mean is: 12 ( 4+14+18= 36 divided by 3=12)

I have no Mode

The Range is: 14

The median is: 14

*Group J*

Georgia: 4,14,18

36

Zara: 0,12,25

37

Maia: 1,18,7

26

Jacob: 30,25,23

78

Jett: 13,15,25

53

Thomas: 1,15,25

41

36+37+26+78+53+41= 271

Mean: 15

Mode:25

Median: 15

Range: 30

Reflection: I think our group worked great as a team and we all shared our scores kindly. I got it on my blog quick and I think it looks pretty cool.

Georgia you demonstrate a really clear understanding of the MMMR and worked out all that was required of you. It would have been great to see how and what strategy you used to solve the group MMMR.

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