Find the Following Probabilities:
(A) $Y \text { is distributed } \chi _ { 4 } ^ { 2 } \text {. Find } \operatorname { Pr } ( Y > 9.49 ) \text {. }$

question 27

Essay

Find the following probabilities:
(a) $Y \text { is distributed } \chi _ { 4 } ^ { 2 } \text {. Find } \operatorname { Pr } ( Y > 9.49 ) \text {. }$

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Definitions:

Perceive

To become aware of, know, or identify by means of the senses.

Brightness

A perceptual attribute of light sources and colors that enables an observer to judge their intensity or illumination.

Colour Vision

The ability of the eye and brain to distinguish objects based on the wavelengths (or frequencies) of the light they reflect or emit.

Cones

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