The variance is
1. directly proportional to the average squared difference between all pairs of observations.
2. smallest when calculated from the mean.
3. denoted by symbol cr.
4. described as the dispersion of the distribution.
Which of the statements given above is/are correct?

Home science extension is

A. extending technical knowledge to wives or ladies in urban and rural areas

B. extending knowledge about agricultural machinery

C. extending knowledge on the managing and running of industries

D. All of the above

An extension education is basically

A. need oriented

B. local resource based

C. problem solution oriented system

D. All of the above

The areas of extension education can be divided into

A. agricultural extension

B. home science extension

C. agricultural engineering extension

D. All of the above

Who is the father of extension education?

A. O. P. Dahama

B. Mildred Horton

C. J. P. Leagans

D. Kelsey and Hearne