1.
For a given class 30-44 the midpoint will be ________________?

2.
________ paper is needed to show the graphs of frequency distribution?

3.
When in a frequency distribution the maximum frequency occur at one end, then the frequency curve of such distribution is ________________?

4.
The graph obtained by joining the mid points of the tops of adjacent rectangles in histogram is called ______________?

5.
The lower class boundary of 25-35 will be ______________?

6.
Class mark is the value which divides a class into ________ equal parts?

7.
Any data collected by the investigator personally from the informants are called __________ data?

8.
data classified by methods are called __________ data?

9.
A source note foot are the _______________?

10.
The difference between the upper and lower class boundaries of a class are know as _________________?