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

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

A. 30

B. 34

C. 37

D. 35

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

A. Ordinary

B. Graphs

C. Photo

D. Chart

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

A. J- shaped

B. U- shaped

C. Bell- shaped

D. V- shaped

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

A. Frequency polgon

B. Ogive

C. Pie chart

D. Histgram

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

A. 20

B. 25

C. 30

D. 35