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PSYCHOLOGY 255 COMPREHENSIVE EXAM 2026 QUESTIONS AND ANSWERS GRADED A+

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PSYCHOLOGY 255 COMPREHENSIVE EXAM 2026 QUESTIONS AND ANSWERS GRADED A+

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PSYCHOLOGY 255 COMPREHENSIVE EXAM
2026 QUESTIONS AND ANSWERS GRADED A+

◉ Central tendency. Answer: Measures that summarize a set of data.


◉ Mean. Answer: Average value of a data set.


◉ Median. Answer: Middle value dividing a data set in half.


◉ Mode. Answer: Most frequently occurring value in a data set.


◉ Variance. Answer: Average of squared deviations from the mean.


◉ Standard deviation. Answer: Measure of data dispersion around
the mean.


◉ Z-score. Answer: Indicates how many SD a score is from the mean.


◉ Effect size. Answer: Magnitude of a study's result quantified.


◉ Inferential statistics. Answer: Techniques estimating population
values from sample data.

, ◉ Estimation. Answer: Using sample data to infer population
characteristics.


◉ Null hypothesis. Answer: Assumes no effect or relationship exists
in population.


◉ Type I error. Answer: Rejecting null hypothesis when it is true.


◉ Type II error. Answer: Failing to reject null hypothesis when it is
false.


◉ Statistically significant. Answer: Results unlikely due to chance,
indicating a real effect.


◉ Decision errors. Answer: Mistakes made in hypothesis testing
outcomes.


◉ Informed Consent. Answer: Written document detailing
procedures, risks, and benefits.


◉ Deception. Answer: Omission or commission of information in
research.

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