The Components of Vectors $\overrightarrow { \mathrm { B } }$

question 14

Multiple Choice

The components of vectors $\overrightarrow { \mathrm { B } }$ and $\overrightarrow { \mathrm { C } }$ are given as follows: $B _ { x }$ = -9.2 $C _ { x }$ = -4.5 $B _ { y }$ = -6.1 $C _ { y }$ = 4.3 The angle (less than 180°) between vectors $\overrightarrow { \mathrm { B } }$ and $\overrightarrow { \mathrm { C } }$ is closest to

• A)77°.
• B)103°.
• C)10°.
• D)170°.
• E)84°.

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Definitions:

Mean Square

Mean Square is a statistical measure represented as the sum of squares divided by the degrees of freedom, often used in variance and regression analysis.

Null Hypothesis

The assumption that there is no significant difference or effect, serving as the default position to test against an alternative hypothesis.

Test Statistic

A value calculated from sample data during hypothesis testing. It's used to determine the probability of observing the sample results under the null hypothesis.

Completely Randomized Design

An experimental design in which subjects are randomly assigned to treatments, ensuring that each treatment group is statistically equivalent.