The Night Before a History Test, You Decide to Go

question 154

Multiple Choice

The night before a history test, you decide to go to the movies instead of reviewing your notes. You get 60 percent on your test compared with the 75 percent that you normally score. You ________ a tradeoff and the opportunity cost of your evening at the movies was ________.

• A)faced; the 15 percent fall in your grade
• B)did not face; zero
• C)did not face; the 15 percent fall in your grade
• D)faced; the mark of 60 percent on your test
• E)did not face; the mark of 60 percent on your test

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Definitions:

Z-test

A method of statistical analysis that evaluates whether there is a significant difference between the means of two populations, given known variances and a large sample size.

µ = 109

Represents the mean (µ) of a dataset or distribution, here specifically stated as 109.

Z-statistic

A specific kind of norm score that shows the number of standard deviations by which an individual item deviates from the distribution's average.

Critical Value

The threshold in a statistical test that defines the boundary for rejecting the null hypothesis.