MEAN
The mean of any data is always the average. This is a good way of calculating average in any data, but not the best.
Finding the mean = Added sum of all the data's
Number of Data
In a data set of
2,4,6,3,4,5,2, 5, 3, 9.. Find the mean
First step is to add up all these numbers
2+4+6+3+4+5+2+5+3+6
= 40
Now divide 40 by the number of Data
Number of data = 10.
Mean = 40/10 = 4
In a data set of
2,4,6,3,4,5,2, 5, 3, 9.. Find the mean
First step is to add up all these numbers
2+4+6+3+4+5+2+5+3+6
= 40
Now divide 40 by the number of Data
Number of data = 10.
Mean = 40/10 = 4
MODE
The mode in a data set is the most repeated number in a data set
In a number set of
2,6,5,5,4,8,1,2,3,5,9,8,5
The most re- occurring number is 5, because it Occurs 5 times, higher that any other number occurred in this set
In a number set of
2,6,5,5,4,8,1,2,3,5,9,8,5
The most re- occurring number is 5, because it Occurs 5 times, higher that any other number occurred in this set
MEDIAN
The median is always the middle number in the data set when its is arranged in ascending order
In a number set of
2, 5, 4, 7, 5, 4 ,1 ,2
The first step is to arrange them in ascending order
1,2,2,3,4,4,5,5,7
The middle number is 4, because there are four numbers before and after it .
If i added a 1 to the data set above, then it would look like this
1, 1, 2, 2, 3, 4, 4, 5, 5, 7
The median would change.
Now there are two middle numbers 3 and 4.
To find the median, find the mean if those two numbers,
So.. 3+4= 7.. 7/2 = 3.5
The median = 3.5
In a number set of
2, 5, 4, 7, 5, 4 ,1 ,2
The first step is to arrange them in ascending order
1,2,2,3,4,4,5,5,7
The middle number is 4, because there are four numbers before and after it .
If i added a 1 to the data set above, then it would look like this
1, 1, 2, 2, 3, 4, 4, 5, 5, 7
The median would change.
Now there are two middle numbers 3 and 4.
To find the median, find the mean if those two numbers,
So.. 3+4= 7.. 7/2 = 3.5
The median = 3.5
RANGE
This is the highest number minus the lowest number in a set.
All these are different methods used to find the middle point of any data except the range. The range gives you an idea of how the data plot is spread