Starnes, UPDATED The Practice of Statistics, 6e, Chapter 12

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4 Terms

1
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chi-square test statistic

Measure of how far the observed counts are from the expected counts relative to the expected counts.

2
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chi-square distribution

A distribution that is defined by a density curve that takes only non-negative values and is skewed to the right. A particular chi-square distribution is specified by giving its degrees of freedom.

3
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population (true) regression line

Regression line µy = α + βx calculated from every value in the population.

4
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sample regression line (estimated regression line)

Least-squares regression line ŷ = a + bx computed from the sample data.