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PSYCHOLOGY 255 PRACTICE SCRIPT 2026 TESTED QUESTIONS WITH ANSWERS

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PSYCHOLOGY 255 PRACTICE SCRIPT 2026 TESTED QUESTIONS WITH ANSWERS

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PSYCHOLOGY 255 PRACTICE SCRIPT 2026
TESTED QUESTIONS WITH ANSWERS

◉ What is power? Answer: Calculated to find sample size, tells you
how good the study is (0-1)


◉ What is power analysis? Answer: Determines when to stop a
study based on sample size


◉ What is statistical significance? Answer: P-value: less than 0.05
reject null, significant
Ex: F(3, 24) = 7.18, P = 0.03


◉ What is a p-value? Answer: Greater than 0.05 Fail to reject null
Ex: F(5,15) = 8.7, P = 0.07


◉ What is a type 1 error? Answer: Saying data is significant when it
is not


◉ What is a type 2 error? Answer: Saying data is not significant
when it actually is

, ◉ What is convenience sampling? Answer: Using easiest reached
individuals, done at the convenience of the researcher most popular.


◉ What is random sampling? Answer: Selecting individuals
randomly, considered the correct way right way.


◉ What is Pearson's R? Answer: Strength of "r" 0-1.0 (0 is weak, 1 is
super strong)
Ex: r = 0.8, Strong r = 0.9, Strong r = 0.1 Weak, r = 0.5 Moderate


◉ What is the significance in Pearson's R? Answer: Only look at the
p-value


◉ What is the strength in Pearson's R? Answer: Only look at the r
value


◉ What is 'r' in Pearson's R? Answer: Bivariate linear function with
normal distribution


◉ What is 'R' in Pearson's R? Answer: Multivariate linear function
with normal distribution


◉ High external validity = Answer: low internal validity (vice versa)

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