SPSS & Excel Flashcards
What do you need to do to compute a variable?
This means making a new variable, for example trust in internet, from different survey measures.
Go to compute variable, select all, mean, add each variable associated.
How do you run a one sample t test?
With a T test, you are comparing data to something already know/ data given. For example, your sample weight to the population average.
From T test, add the value you already know, are comparing the data to, in “test value.”
How do you identify outliers from z scores?
Analyse - Descriptive Statistics - Descriptives
Those with scores +/- 3 are outliers.
How do you filter out outliers?
Scores +/- 3 are outliers.
Data – Select Cases – If condition satisfied …
All, Abs, (zage..) =<3 (add what you want to include, anything lower than 3)
How do you report the results on a one sample t test?
You add mean, standard dev. Then,
“… is significantly/not significantly different from (add test value) (t=xxx, sig). We reject/accept null”
What are you doing in an independent samples t test?
Comparing two variables, like the height of males vs height of females.
How do you read if the results are significant or not?
Look at the p value associated with Sig. 2 tailed column. If it is less than .05, then there is evidence that there is a statistically significant difference. You reject the null hypothesis.
How do you run ANOVA?
Analyse, compare means, one way ANOVA.
The factor is the group/treatment.
What do you report for ANOVA?
The degrees of freedom, the F score and significance level.
What is an easy way to check assumptions in SPSS?
Explore.
How do you read colinearity statistics? VIF and Tolerance?
VIF should be less than 3 and Tolerance greater than .2
How do you set up the blocks for the hierarchal regression?
- Demographic variables
- Variables that have already been studies
- The variables you are most interested in
How do you tell if something is reliable?
With Cronbach’s alpha: .70 and above is reliable. Based on sample size.
