SPSS practice

(2) Estimate population mean based on sample mean when sigma is not known (t):

&

(3) Test for statistically significant difference between means (do the intervals overlap?):

SPSS, Analyze, Descriptive Statistics, Explore, Statistics, Confidence Interval
Dependent List = Scaled data variable
Factor List = Grouping variable

Graphing (SPSS, Graphs, Legacy Dialogs, Error Bar) Variable = Scaled data variable, X axis = Grouping variable


Test for statistically significant difference between means (does interval contain zero?) for (4) between groups:

SPSS, Analyze, Compare Means, Independent Samples T-test (Does the interval cross zero? If crosses zero, then no significant difference.)


Test for statistically significant difference between means (does interval contain zero?) for (5) repeated measures:

SPSS, Analyze, Compare Means, Paired Samples T-test (Does the interval cross zero? If crosses zero, then no significant difference.)