A Strobe Photograph Shows Equally-Spaced Images of a Car Moving

question 10

Multiple Choice

A strobe photograph shows equally-spaced images of a car moving along a straight road.If the time intervals between images is constant,which of the following cannot be positive?

• A)the speed of the car
• B)the average velocity of the car
• C)the acceleration of the car
• D)the direction of motion of the car

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Definitions:

Sample Survey

A method of collecting data by selecting a subset of individuals from a population to estimate characteristics of the whole population.

Double-Blind Experiment

An experimental method in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias.

Double Blind

An experimental design where neither the participants nor the experimenters know who is receiving a particular treatment, preventing bias in research results.

Explanatory Variable

A factor in a statistical model that is believed to cause or influence changes in a response variable.