When the Error Variance Is Nonconstant,it Is Common to See

question 39

Multiple Choice

When the error variance is nonconstant,it is common to see the variation increases as the explanatory variable increases (you will see a "fan shape" in the scatterplot) .There are two ways you can deal with this phenomenon.These are

• A)the weighted least squares and a logarithmic transformation.
• B)the partial F and a logarithmic transformation.
• C)the weighted least squares and the partial F.
• D)stepwise regression and the partial F.

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Definitions:

Population Proportion

Refers to the fraction or percentage of individuals in a population having a particular property or characteristic.

Large Animals

Typically refers to animals of a considerable size, often used in contexts related to veterinary science, zoology, or animal husbandry.

Large-Sample Z

A statistical test used when comparing sample proportions or means with a large sample size, typically using a Z-distribution.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter with a certain degree of confidence.