In Estimating the Parameters of a Population of Students Categorized

question 24

Multiple Choice

In estimating the parameters of a population of students categorized by year in school, which of the following estimators is the most nonbiased?

• A) Mean
• B) Median
• C) Standard deviation
• D) Variance

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Definitions:

Multiple Regression Model

A predictive method in statistics that uses a range of explanatory variables to estimate the result of a dependent variable.

Independent Variables

Variables in an experiment or statistical model that are manipulated or categorized to determine their effect on dependent variables without being affected by any other variable in the model.

Homoscedasticity

A term in statistics describing a situation where all random variables across a dataset have the same finite variance.

Normality Of Errors

An assumption in many statistical models that the errors in the predictions are normally distributed.