Technician a Says That Ball Hitches Cannot Be Used on Highway

question 9

Multiple Choice

Technician A says that ball hitches cannot be used on highway tractor-trailer combinations.Technician B says that a standard drawbar eye can be connected to a heavy-duty ball hitch.Who is correct?

• A) Technician A only
• B) Technician B only
• C) Both A and B
• D) Neither A nor B

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Definitions:

Covariance

A measure indicating the extent to which two random variables change in tandem.

Covariance

A measure that indicates the extent to which two variables change together, showing if increases in one variable correspond to increases or decreases in another.

Degrees Of Freedom

The number of values in the calculation of a statistic that are free to vary, often related to the sample size.

Pearson Correlation

A measure of the linear correlation between two variables, giving a value between -1 and 1 inclusive, where 1 is total positive linear correlation, 0 is no linear correlation, and -1 is total negative linear correlation.