Week 3 SPSS Prac Demo Flashcards
Final Exam
What does a Pearson correlation of r = 0.944 indicate about Rainfall and Growth?
There is a very strong positive linear relationship.
When should you use Spearman’s rho instead of Pearson’s r?
When data are ordinal or non-normally distributed.
Which SPSS path calculates a Pearson correlation?
Analyze > Correlate > Bivariate
Which shape indicates bivariate normality in a scatterplot?
Elliptical cloud centered along regression line
Which SPSS function allows grouped analyses (e.g. Virtual vs In-person)?
Data > Split File
Which residual plot is most useful for testing homoscedasticity in regression?
Scatterplot of residuals vs predicted values.
What does a partial correlation control for?
The influence of a third variable.
In SPSS, what does ‘Split File’ allow you to do?
Analyze subsets of the data by a grouping variable.
What is the main assumption violated in a triangular scatterplot pattern?
Bivariate normality.
Which correlation would you use if both variables are ordinal?
Spearman’s rho.
Which menu path produces a partial correlation in SPSS?
Analyze > Correlate > Partial
Which output suggests that residuals are approximately normal?
Histogram of residuals is roughly bell-shaped.
What does a correlation of r = 0.01 suggest?
There is almost no linear relationship.
Which output value shows statistical significance in a correlation matrix?
Sig. (2-tailed) < .05
How is the strength of a correlation interpreted?
By the absolute value of r.
Which scenario best requires a partial correlation?
You want to examine two variables, removing third-variable effects.
Which variable type is appropriate for bivariate correlation?
Scale (interval or ratio)
What does ‘two-tailed significance’ in SPSS output indicate?
Test for any non-zero relationship (positive or negative).
Why might Spearman’s correlation be used even for scale variables?
If the scale variables are skewed.
What would you expect in the Sig. column if p < .001?
It will show .000 (but report it as p < .001).
