Wednesday 8 February 2012

Range in Grade VIII

Range in Class VIII.
Hello children! Previously we have discussed about column multiplication. Now we will study about the topic Range which comes under gujarat education board.
In statistics, range means to find the difference between the largest and the lowest frequency of the given data.
So, for finding range we first need to arrange the given data in ascending or descending order in order to get the accurate information.
The formula for range is:
Range = highest value - lowest value.
It actually gives the length of the smallest interval which contains all the information of the given data. It gives the variation of the spread of the data.
 Let us understand it more clearly through some examples.
The ages of the ten teachers in the school, they are 35, 28, 36, 26, 45, 30, 29, 35, 26, and 30. Now for finding range of age of teachers in a school, we first arrange the given data in ascending order. We get: 26, 26, 28, 29, 30, 30, 35, 35, 36, and 45.
We observe that the teacher with least age is 26 and the teacher with largest age is 45.
So Range = Maximum age - minimum age
                  = 45 - 26 = 19 years.
Which means that range of age of teachers in the school is 19 years.

In the next topic we are going to discuss Sampling techniques and You can visit our website for getting information about physics problem solver.

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