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: