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PYC3714-26-EX06

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What does it mean when two events are independent in probability?
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A sociologist wants to investigate stress levels among high school teachers in South Africa. Because it is not possible to study every high school teacher in the country, what is the MOST appropriate course of action?
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Which of the following research designs best exemplifies a matched pairs design?
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When selecting an appropriate test statistic for a research study, which of the following factors is most relevant according to the criterion of relevance?
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A box contains 10 apples, 10 oranges, and 10 bananas. One fruit is randomly selected from the box. If two fruits are randomly selected from the box without replacement, what is the probability that both are bananas?
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The interval scale of measurement is often described as a quantitative level of measurement. Why is this the case?
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A researcher wants to investigate whether there is a relationship between levels of depression and academic performance among university students. She measures: Depression levels using the Beck Depression Inventory (BDI) (higher scores = higher levels of depression), and Academic performance using final course marks (out of 100). Data was collected from 10 undergraduate students. Which of the following correctly states the hypotheses?
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In hypothesis testing, what does this sign

indicate?

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A researcher wants to

investigate whether a stress

management workshop reduces

students’ perceived stress levels. She recruits 12 university students and

measures their stress levels using the Perceived Stress Scale (PSS) before the

workshop and again four weeks after the workshop. Higher scores indicate higher

stress levels. The dependent t

test produces the following

result: t(11)=2.45,  p=0.032. The significance level is α = 0.05. What

conclusion should the researcher draw?

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A psychologist notices that people who are frequently exposed to stressful environments show higher levels of anxiety. This statement is an example of a:
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