(Answered) 1 distinguish between classification and tabulation of data

Statistics

1. Distinguish between Classification and Tabulation of data. What are the types of Classification of data?

2. Calculate mean and median for the following data

Marks	0-20	20-40	40-60	60-80	80-100	100-120	120-140
No of Students	4	26	22	10	9	6	3

3. Calculate the regression equations of X on Y and Y on X from the following data:

X	1	2	3	4	5
Y	2	5	3	8	7

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