3. Optimum size of sample depends upon:
(a) Reliability
(b) Accuracy
(c) Unbiasedness
-(d) All of the above
Answers
the correct answer is ld
The optimum sample size in Statistics depends on all the given factors,that is,reliability,accuracy and unbiasedness. Hence,the correct answer is option d) or All of the above.
Explanation:
First,reliability is one of the major considerations to attain optimum sample size.Reliability main refers to the validity and reliability of sample sources or sample type.A researcher must carefully choose the source of the sample or the type of the sample based on the topic and target population of his/her study,which can determine the validity or optimum size of the sample.
Secondly,the researcher must be aware about the accuracy of the sample size with respect to the target population of the study.Accuracy,in this context, implies how well the sample estimates replicate or correspond to the actual population parameters.Therefore, a sample should not be too large or small but optimal enough to accurately correspond to the actual target population data.
Lastly,a researcher must be completely unbiased in choosing the sample size with focus on the actual target population of the study.He or she must not be biased towards any particular criteria of the population such as particular demographic features such as age,income,skin complexion,religious group,caste etc while determining sample from the population.If the researcher becomes too selective while choosing sample,it will provide biased study results and thus,the sample should unbiasedly represent the actual target population of the study.