Mean

In statistics we define the term mean . Now What is a Mean? It is the part of the mathematics in which we define the central value for the given set of data values .Mean is a concept that define the one value that represent the whole set in terms of single value .Sometimes it is also called as the average for the given set of data .When we talk about the average of the values is also known as the arithmetic mean that is define as the sum of the all values in the given data set that is divided by the number of values in the data set .
If there is five values in the given data set that are n1 , n2 , n3 , n4 and n5 then the average or arithmetic mean is defined as the formula
Mean = sum of all values / number of values = (n1 + n2 + n3 + n4 + n5 ) / 5 .
If we talk about the types of mean then there are three types of mean in the statistics that are named as:
(I) : arithmetic mean
(II) : geometric mean
(III) : harmonic mean
As we discuss above normally arithmetic mean is define as the average value or standard average.
When there is talk about the geometric mean then it is calculated by multiplying all the terms .This types of mean are used for calculation of growth rates.
Geometric mean g = ( ∏ⁿ _i=0 g _i ) ^{1 / n} .
When some relation is define between the units of set of numbers then there will be use harmonic mean.
When we talk about the use of the mean it is mainly helps in probability that is also known as the mean in probability. for more information on mean visit here

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median

Hello students, in this blog we are going to read the How to Find Median. Median is the very important concept that comes under in statistics and probability. In the statistics it comes under the measure of the central tendency. Median divides the number series into two equal parts. In any number list the middle number from the number list is the median. For example we have number series 1, 2, 3, 4, 5, 6, 7 so the median will be 4. To calculate the median (read here for more) the following steps should be consider in mind, that are: -
-List of numbers should be finite.
-The numbers should be arranged in ascending order.
-If the given number list is odd then the median will be the number that is coming in the middle.
-If the given number list is even then the median will be calculated by taking two middle number's average.
Let’s take some example to understand the median more.
Example 1: - Find the Median for 14, 11, 18, 20, 28 and 29.
Solution: - Given the set of numbers are: 14, 11, 18, 20, 28, 29
Arrange the numbers in an ascending order 11, 14, 18, 20, 28 and 29
The given set has an even number of value.
So the median will be the average of two middle numbers.
The average of two number is (18 + 20)2 = 38 / 2 = 19.
So the median is 19.
Example 2: - Find the Median for 11, 34, 14, 18 and 29.
Solution: -The given set of numbers: 11, 34, 14, 18, 29
Arrange the numbers in the ascending order 11, 14, 18, 29, 34
The given set has an odd number of values.
So the middle number will be the median.
The center number is 18
So the median is 18


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