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Chapter 12: Q. 2 (page 520)

Regarding a x2-curve:

Part (a): At what point on the horizontal axis does the curve begin?

Part (b): Classify its shape as symmetric, left skewed, or right skewed.

Part (c): As the number of degrees of freedom increases, a x2-curve begins to look like another type of curve. What type of curve is that?

Short Answer

Expert verified

Part (a): The curve x2starts at 0on the horizontal axis.

Part (b): The shape of the curve x2is right skewed.

Part (c): It will be a normal type of curve.

Step by step solution

01

Part (a) Step 1. Starting point of the curve.

Regarding thex2-curve,

A x2-curve starts at 0on the horizontal axis and extends indefinitely to the right, approaching but never touching, the horizontal axis.

02

Part (b) Step 1. Classify the shape of the curve.

Regarding the x2-curve,

The x2 has a right skewed shape.

03

Part (c) Step 1. What if the number of degrees of freedom increases.

Regarding the x2- curve,

As the number of degrees of freedom increases, x2- curves looks like increasingly normal curves.

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