A Ball Is Thrown Downward from the Edge of a Cliff

question 9

Multiple Choice

A ball is thrown downward from the edge of a cliff with an initial speed that is three times the terminal speed. Initially its acceleration is

• A) upward and greater than g
• B) upward and less than g
• C) downward and greater than g
• D) downward and less than g
• E) downward and equal to g

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Definitions:

Test Statistic

A statistic (a function of the data) used in statistical hypothesis testing to decide whether to reject the null hypothesis.

P-value Approach

A method in hypothesis testing that uses the p-value, the probability of obtaining test results at least as extreme as the observed, under the assumption the null hypothesis is true.

Critical Values

Specific points along the scale of a test statistic that delineate the acceptance or rejection of the null hypothesis.

Two-Tailed Hypothesis

A statistical test where the area of interest lies in both tails of the distribution, testing for the possibility of a relationship in both directions.