Aspects of regression Flashcards by Alex Ojinnaka

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Q

Checklist for OLS accuarcy estimates (3)

A

Significant number of data points/sample variables 2. Significant range/variability of x-variables 3. Significantly low error/scattered variables

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Q

What does a 95% confidence indicator for ß prove?

A

That if you repeatadly use the CI formula, 95% of the intervals constructed will contain ß

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Q

If ß=0 then X…

A

has no explanatory value

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Q

2 ways to test if ß=0

A

The CI contains 0
t-statistic (ß estimate/standard error)

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Q

If P value (t-test) greater than 0.05 show

A

t is small therefore ß=0

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Q

When are tests for R² and ß=0 the same?

A

In simple regression

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Q

If P value (F-test) greater than 0.05 then…

A

R²=0

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