Sampling Techniques-Simple Random Sampling and Sampling With Probability Proportional to Size (ISS (Statistical Services) 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

Essay Question▾

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.

Explanation

Sample mean is an unbiased estimator of population mean i. e.

Sample mean is given by

It can also be written as

Where

… (332 more words) …

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