An Estimator of the Population Value Is More

question 42

Multiple Choice

An estimator of the population value is more efficient when compared to another estimator ,if

• A)E( )> E( ).
• B)it has a smaller variance.
• C)its c.d.f.is flatter than that of the other estimator.
• D)both estimators are unbiased,and var( )< var( ).

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Definitions:

Null Hypothesis

The default position in statistical hypothesis testing that assumes no relationship or effect between the variables being studied.

P-value

The likelihood of getting test outcomes that are as significant as or more so than the ones actually seen, presuming the null hypothesis is true.

Level of Significance

The probability of rejecting the null hypothesis in a statistical test when the hypothesis is true; often represented by alpha (α).

Grand Mean

The mean or average of several group means, which gives an overall measure of the central tendency across all the groups considered together.