Hello students, in this blog we are going to discuss the measures of central tendency that are the very important concept in the statistics. The most important central tendency measures are mean, median and mode. We calculate the mean, median and mode for the ungrouped data and we can calculate the mean, median and mode also for grouped data. Let’s discuss the all measure one by one.
Mean: - It means average of the whole numbers, like we have 9 numbers then we will add the 9 numbers together and divide by the 9, 9 is because total number are 9. For example: -
8, 7, 6, 8, 7, 5, 7, 6, 5, 6
Then add the all number and divide the total sum by 10, because 10 numbers are there.
8 + 7 + 6 + 8 + 7 + 5 + 7 + 6 + 5 + 6 / 10,
6.5 is mean,
This example was for the ungrouped data. We can calculate the mean when we have grouped data, to do this we have three methods they are: -
-Direct method.
-Shortcut method.
-Step-deviation method.
The all three methods have their respected formulas.
Medan (from CBSE Books): - Median is the middle value in the number distribution. Like we have 7 numbers then the median will be 4th number and if we have 6 number then add the 3rd and 4th number and divide it by the 2, then he result will be median. For example 6, 7, 5, 4, 2 then the median is 5.
Mode: - The mode or mode value of a distribution is that value of the variable for which the frequency is maximum. For example 2, 6, 7, 2, 5, in this 2 is mode, because it is occurring at 2 times.
In upcoming posts we will discuss about Conditional probability and Conditional statements. Visit our website for information on Confidence Interval Formula
Mean: - It means average of the whole numbers, like we have 9 numbers then we will add the 9 numbers together and divide by the 9, 9 is because total number are 9. For example: -
8, 7, 6, 8, 7, 5, 7, 6, 5, 6
Then add the all number and divide the total sum by 10, because 10 numbers are there.
8 + 7 + 6 + 8 + 7 + 5 + 7 + 6 + 5 + 6 / 10,
6.5 is mean,
This example was for the ungrouped data. We can calculate the mean when we have grouped data, to do this we have three methods they are: -
-Direct method.
-Shortcut method.
-Step-deviation method.
The all three methods have their respected formulas.
Medan (from CBSE Books): - Median is the middle value in the number distribution. Like we have 7 numbers then the median will be 4th number and if we have 6 number then add the 3rd and 4th number and divide it by the 2, then he result will be median. For example 6, 7, 5, 4, 2 then the median is 5.
Mode: - The mode or mode value of a distribution is that value of the variable for which the frequency is maximum. For example 2, 6, 7, 2, 5, in this 2 is mode, because it is occurring at 2 times.
In upcoming posts we will discuss about Conditional probability and Conditional statements. Visit our website for information on Confidence Interval Formula
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