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STATISTICS-MEAN, STANDARD DEVIATION AND VARIANCE-APPLICATION

STATISTICS is the science of organizing, summarizing ,grouping of data and analyzing of data for decision making

How can statistics help you in data analysis and interpretation.

MEAN- This helps you to determine the arithmetic average of a data.

Data below show data the performance of students of obitaxanswer in the SSSE Exam.

2,2,2,3,3,2,4,4,1,1,8,8,8,8,9,10.

What is the average performance of the students?

X F FX
1 2 2
2 4 8
3 2 6
4 2 8
8 4 32
9 1 9
10 1 10

∑FX=16 ∑FX=75

∑FX/∑FX
16 75 =75/16
4.6875
=4.7

STANDARD DEVIATION AND VARIANCE

This helps you to know how dispersed is the data from the mean.

That means how scattered are the data from the mean.

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