4.
. . . . . . . . enable the psychologists to obtain large quantities of data from people with minimum disturbance of their living routines and without elaborate laboratory equipment

5.
Validity is concerned with generalizability' means

6.
The most widespread use of statistical methods came in connection with the development of intelligence tests and related research on

9.
A psychological test is a standardized procedure to measure one or more than one aspect of trait by means of a sample of verbal or non-verbal behaviour

10.
. . . . . . . . is a convenient method for expressing the degree of relationship between two variables.