Sampling Techniques-Simple Random Sampling and Sampling With Probability Proportional to Size (ISS Statistics Paper III): Questions 1 - 1 of 1
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Question number: 1
» Sampling Techniques » Simple Random Sampling and Sampling With Probability Proportional to Size
Appeared in Year: 2013
Describe in Detail
In simple random sampling without replacement (SRSWOR), the sample mean is an unbiased estimator of population mean . Obtain the variance of the estimator of the population total Y.
Sample mean is an unbiased estimator of population mean i. e.
Sample mean is given by
It can also be written as