Using the Hat Matrix Elements Hi to Determine Influential Points $h _ { i } < 2 ( k + 1 ) / n$

question 125

Multiple Choice

Using the hat matrix elements hi to determine influential points in a multiple regression model with k independent variable and n observations, Xi is an influential point if

• A)\(h _ { i } < 2 ( k + 1 ) / n\)
• B)\(h _ { i } > 2 ( k + 1 ) / n\)
• C)\(h _ { i } < n ( k + 1 ) / 2\)
• D)\(h _ { i } > n ( k + 1 ) / 2\)

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Definitions:

Cones

Photoreceptor cells in the retina of the eye responsible for color vision and visual acuity under bright light conditions.

Regulate

To control or maintain the rate or speed of a machine or process so that it operates properly.

Pupil

The opening in the center of the iris of the eye that adjusts in size to regulate the amount of light reaching the retina.

Focuses Light

The process of adjusting the path of light rays to converge at a point or to spread out from a point.