The experimental study is based on the law of
A. | single variable |
B. | replication |
C. | occupation |
D. | interest of the subject |
Option: A Explanation : |
A statistical measure based upon the entire population is called parameter while measure based upon a sample is known as
A. | sample parameter |
B. | inference |
C. | statistic |
D. | none of these |
Option: C Explanation : When we study about an event by taking a sample from the population it is called statistic and a group of statistical measures is called statistics. |
The final result of a study will be more accurate if the sample drawn is
A. | taken randomly |
B. | fixed by quota |
C. | representative to the population |
D. | purposive |
Option: C Explanation : The more the sample represents the population the more accurate are the results of the study. Sample can be made more representative either by increasing the size of the sample or by following more reliable method of sampling. |
Which of the following is a non-probability sample ?
A. | Quota sample |
B. | Simple random sample |
C. | Purposive sample |
D. | (a) and (c) both |
Option: D Explanation : |
Independent variables are not manipulated in
A. | normative researches |
B. | ex-post facto researches |
C. | both of the above |
D. | none of the above |
Option: C Explanation : In normative researches only data are collected from the survey and after 'analysing them results are declared. Thus there is no need of manipulating independent variables. In ex-post facto-research effects are already known and researcher studies the causes lying behind these r effects. Here too independent variable are not manipulated. |