Starting Statistics

In math class, we started our new unit, which is statistics. Statistics is the branch of mathematics that is concerned with the gathering and organisation of numeral information called data. There are three basics steps:

  • Collecting the data
  • Sorting the data
  • Analysing the data

Everyone have to find 20 data in the real world or on the internet. Then, we have to find the mean, mode, median and range.

On the internet, I found the data of  the teams reaching top four in FIFA World Cup. This is the data:

Range- Range is the difference between the lowest and highest values. The range of the data is 11 because 12(the biggest number in the data) subtract 1(the smaller number in the data) is 11. 

Mean- Mean is the average of the numbers: a calculated “central” value of a set of numbers. The calculation is adding the whole numbers and then divide by how many numbers there are. The mean of the data is 3.6 because (all the numbers in the data) 10+8+12+4+5+5+2+2+4+The+2+4+2+2+2+1+1+1+1+2= 72 and then 72 divide 20(how many numbers there are) equals to 3.6.

Median- The middle number in a list of numbers. To calculate, you have to put the numbers from smallest to biggest, and then find the middle number.  The median of the data is 2 because if you put it order:

1 1 1 1 2 2 2 2 2 2 2 2 4 4 4 5 5 8 10 12

there is two middle numbers, so then you have to add them(2+2) and then divide the added number with two, which is 4 divide by 2 equals to 2.

Mode-  The number which appears most often in a set of numbers.  The mode of the data is 2 because if you put the numbers in order, you will see that 2 appears the most. 

1 1 1 1 2 2 2 2 2 2 2 2 4 4 4 5 5 8 10 12

(All the definitions of the words are from http://www.mathsisfun.com/)

My data tells me that a lot of team reaching top four got it two times. Also, the average of the team reaching top four is about 3-4 times.

 

 

 

 

 

 

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