Athletics Day Results | Maths

This week, we did a statistical investigation to figure out the average score of each group in Athletics Day.

First, we added up the data sets using a google sheet. To add data sets, we can use repeated addition or multiplication. We wanted to add the data sets up quickly, so we used multiplication. If a data set was 2+3+3+2+1+3+4+2, we could make it easier to solve this equation by doing (4x1) + (3x3) + (2x2) + (1x1) instead. 4x1=4, 3x3=9, 2x2=4, and 1x1=1. We add all of the totals up and it equals 18. This strategy is quicker than repeated addition because instead of adding up the numbers individually, you can add them up all at once.

Then, we needed to find the average group score. We added all of the groups points then divided the total by the amount of classes there are, which is 9. When we add all of the scores 19 + 17 + 19 + 26 + 17 + 24 + 18 + 18 + 24 = 182. Then tried to find the answer out with out using the google sheet formula. First I split 180 into 160 and 20. Then I divided 160 by 2 which made 80. I then took away 40 from the 80 which made 40 and then split 40 into 20. Then I took away 4 from the 20 to make 16. Then I split 16 into 8 2's wich makes 0.22222222 and then added the extra 20 wich made 20.22222222. 

It is important to understand how to use statistical investigations because it can make adding, subtraction, multiplying or dividing numbers easier.

LI: to explore statistical investigations.