A Vector Has an X Component of 5

question 15

Multiple Choice

A vector has an x component of 5.51 units and a y component of -9.52 units.The angle between the positive direction of the vector and the positive direction of the x axis is approximately

• A)30º
• B)-30º
• C)60º
• D)-60º
• E)None of these is correct.

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Definitions:

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.

Negative Number

A real number that is less than zero, indicating a lack of something or a decrease in a given value.