The above three are considered the key elements in finding the solutions of various questions of statistics. Here is the explanation of these.
What is mean?
The average of all the values or figures present in the data is termed as the mean value. You can also say that mean is the central value from a whole set.
How to find mean?
There is not a long procedure of calculating the mean. You have to just add all the numbers of the group or the set and then divide by the total numbers present in that group.
Formula of mean:
What is Median?
The mid most value in the whole set of the figures is called as median. You have to rearrange the numbers from lower to higher. If not you can also rearrange them into higher to lower then you can easily find out the middle most value. Median can divide the whole data into two halves.
How to find median?
If you have to find the median, arrange the data by writing the values from smallest to largest. In other words you have to arrange it in ascending order. After that find out that value which has equal number of numbers on its left side as well as right side. It will be the mid most value. But if your data has even or odd numbers then the method is slightly different. The formulas below will clarify you.
Formula of median:
There are two types of exception in finding the median. If the total numbers are present in an odd number then you have to use this formula,
Formula of mode:
For grouped data:
https://teachmeuk.co.uk/ is the site where you can find all the information of mathematics for every level. You will get the formulas, methods, exercises, techniques and many other things on this website.