A Strobe Photograph of a Car Moving Along a Straight

question 9

Multiple Choice

A strobe photograph of a car moving along a straight road shows the interval between each successive image to be diminishing.If the direction of motion of the car is taken as positive,which of the following are negative?

• A) the speed of the car
• B) the average velocity of the car
• C) the average acceleration of the car
• D) all of the above

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Definitions:

Test Statistic

A value derived from sample data used in a hypothesis test to determine whether to reject the null hypothesis.

Wilcoxon Rank Sum Test

A statistical test that does not rely on parameter assumptions to compare two separate samples and ascertain if they originate from an identical distribution.

Independent

A condition where two or more variables or sets of data do not influence or correlate with each other.

Normal Populations

Refers to populations that follow a normal (Gaussian) distribution, with data symmetrically distributed around the mean.