Exam 1: Introduction and Mathematical Preliminaries

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Distinguish between quantitative and qualitative variables.

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The process of translating empirical relationships between objects into numerical relationships is referred to as _____.

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Numerical indices based on data from entire populations are called ____.

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Numerical indices derived from population data are ___;numerical indices derived from sample data are ____.

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Melissa just read the back of her hand sanitizer which says it kills 99.99% of all germs.What is the probability that it will not kill a particular germ?

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6.39489 rounded to three decimal places is equal to ___.

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A clinical psychologist studying the effects of different therapies categorizes patients according to whether they are or are not in therapy.In this case,therapy is a:

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When the categories of a variable can be ordered on some continuum or dimension,that variable is said to be measured on at least a(n)_____ level.

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_____ involves the use of numerical indices to describe either a population or a sample.

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(ÓX)2 = 900 (ÓX)<sup>2</sup> = 900

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Ordinal,interval,and ratio measures must occur on scales that are restricted to positive integers.

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Most measures in behavioral science research are of nominal,ordinal,or interval level,with few being ratio level.

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The number of hours per week that someone watches violent television programs is an example of a(n):

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The probability of observing a head on the sixth toss after flipping a coin 5 times and observing five tails is ____.

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Intelligence is an example of a continuous variable.

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Which of the following levels of measurement involves variables that are not qualitative?

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You are taking a survey where they ask you to rank questions as follows: 1=Strongly agree 2=agree 3=neutral 4=disagree 5=strong disagree. This is what type of scale of measurement?

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Variables measured on a nominal level are called qualitative variables.

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If a researcher is studying how many hours a week a student devotes to playing video games.Playing video games is an example of a _______.

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Jack puts 4 cards in front of you,an Ace,Queen,King and Jack of hearts.What is the probability that you will pick the Ace of hearts?

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