Correct Answer:- Option-D

Question76:-Effect of extraneous variables are controlled through
i. statistical control by the use of covariance

ii. through randomization and matching

iii. By employing multiple regression analysis

A:-i and iii
B:-i and ii
C:-ii and iii
D--i, ii and iii

Correct Answer:- Option-B

Question77:-Following practices can ensure research ethics
i. Promise of confidentiality

ii. Witholding true nature of data collection

iii. Informed consent from all participants

A:-i and iii
B:-i and ii
C:-ii and iii
D--i, ii and iii

Correct Answer:- Option-A

Question78:- is the instrument which fairly and comprehensively covers
the domain that puports to cover

A:-Construct validity
B:-Content validity
C:-Catalytic validity
D:-Consequential validity
Correct Answer:- Option-B

Question79:-Following is the sampling method where, the first unit is selected
randomly and the remaining units of the sample are selected at fixed intervals.

A:-Sequential sampling
B:-Systematic sampling
C:-Cluster sampling
D:-Multi stage sampling
Correct Answer:- Option-B

Question80:-Choose correct statements

1. Type 1 error is the probability of rejecting the null hypothesis when it is actually
true.

ii. Reliability is the extent to which a measure or set of measure correctly represent
the concept of study.

iii. Measurement error is the inaccuracies of measuring the 'true' variable values
due to the fallibility of the measurement instrument.

iv. Multicollinearity is the extent to which a variable can be explained by the other