PSYC 2005 Exam Questions With Correct Detailed Answers.
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Course
PSYC 2005
Institution
PSYC 2005
If 100,000 samples are drawn from a population distributed like this...what, approximately, will the distribution of sample means look like? - correct answer Normal, unimodal distribution
A particular standardized test has a population mean score of 75 and st...
If 100,000 samples are drawn from a population distributed like this...what, approximately, will the
distribution of sample means look like? - correct answer Normal, unimodal
distribution
A particular standardized test has a population mean score of 75 and standard deviation of 7.5, and the
scores are normally distributed. If a person's score places them at the 5th percentile on this test (from
the bottom), what is this person's score? - correct answer 62.70
If a measurement instrument gives consistent scores, the technical term we use to describe this is:
Yet, an instrument can give consistent results, but the results may be inaccurate! The accuracy or
goodness of an instrument's functioning is referred to by the technical term: - correct answer
Reliable; accurate
Where does a Cohen's d effect size of -1.39 fall in terms of Jacob Cohen's suggested conventions? -
correct answer Large
When interpreting a boxplot, what does the top of the box tell you? - correct answer
The 75th percentile score
To be scientific, a theory must be testable. This means the theory must be: - correct answer
Falsifiable
A psychologist is studying the effect of eating ice cream on memory performance. She assigns
participants into groups that eat 1, 2, or 3 scoops one hour before they all take a memory test. What
term best describes the role of "scoops of ice cream" in this study? - correct answer
Independent variable
You are an aspiring wine connoisseur and are interested in how people rate the quality of a certain wine.
You've collected the following data, which represent quality ratings of the wine on a 1-10 scale.
, 9, 8, 5, 4, 5
What is the median rating?
What is the modal rating?
Sum of Squares (SS) =
Variance (SD^2) =
Standard Deviation (SD) = - correct answer 5
5
18.80
3.76
1.94
What's the point of Geoff Cumming's slogan about a confidence interval, "It might be red!"? - correct
answer It might not capture the true population mean from which the sample was
drawn
Which of these describes the shape of a frequency distribution that has clearly been affected by a ceiling
effect? - correct answer Negatively skewed, skewed lef
Which of these is a Z-score you would use if conducting a two-tailed Z test with an alpha level of 0.01? -
correct answer 2.58
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