Mean
Mean is the arithmetic average. To find mean of ungrouped data and it is obtained by adding the raw scores and dividing the sum by the number of items. There are three methods to find mean for a frequency distribution. (i) Direct method, (ii) Short-cut method, ..
Statistics
Statistics - The collection of data, its classification, tabulation and study is called Statistics. Consider the marks obtained (out of 20) in the inter-school talent contest by the students of a school. Jasmine 18 Chandresh 18 Phiroza 17 Darvish 19 Sarabjit 19 Gaurav 15 Sejal 17 Sajid 16 Pooja 16 ..
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