Methodical & Stats Analysis Flashcards
7 cards from real BAPSY practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Methodical & Stats Analysis flashcards as text
A researcher finds r = 0.85 between study hours and exam scores. What does this indicate?
Answer: A strong positive linear relationship
r = 0.85 indicates a strong positive linear relationship, but correlation does not imply causation.
Which of the following best describes a Type II error?
Answer: Failing to reject a false null hypothesis
A Type II error (beta error) occurs when a researcher fails to reject a null hypothesis that is actually false.
In an ANOVA, the F-ratio is computed as:
Answer: Between-group variance / Within-group variance
The F-ratio in ANOVA equals between-group variance (MSB) divided by within-group variance (MSW).
Which sampling method gives every member of a population an equal chance of being selected?
Answer: Simple random sampling
Simple random sampling assigns each population member an equal and independent probability of selection.
A chi-square test of independence is most appropriate when:
Answer: Both variables are categorical
Chi-square tests of independence evaluate whether two categorical variables are associated.
What does statistical power refer to?
Answer: The probability of correctly rejecting a false null hypothesis
Statistical power is the probability (1 − β) of detecting a true effect when one exists.
Which measure of central tendency is most resistant to extreme outliers?
Answer: Median
The median is resistant to outliers because it is based on rank position, not actual values.