Chi-Square Test Concepts and Applications

The video tutorial explains how to run a chi-square test in SPSS using gender and smoking status as nominal variables. It covers setting up data, running crosstabs, and interpreting the results. The tutorial also discusses the assumptions of the chi-square test, significance levels, and effect size, using Phi or Cramer's V. The video emphasizes understanding the association between variables and the importance of statistical significance.

What type of variables are suitable for a chi-square test?

• Ordinal variables

• Nominal variables

• Ratio variables

• Interval variables

In SPSS, which menu option is used to start a chi-square test?

• Analyze > Regression

• Analyze > Descriptive Statistics > Crosstabs

• Analyze > Compare Means

• Analyze > Correlate

What does the expected count in a crosstab represent?

• The actual number of observations

• The number of observations if there is no association

• The number of missing values

• The number of outliers

Why is it important that no more than 20% of cells have an expected count less than five?

• To simplify the analysis

• To reduce the number of variables

• To increase the sample size

• To ensure the test is valid

What does a significant Pearson chi-squared value indicate?

• The sample size is too small

• There is no association between variables

• There is a significant association between variables

• The test is invalid

What is the purpose of using Phi or Cramer's V in a chi-square test?

• To determine the sample size

• To calculate the p-value

• To identify outliers

• To measure the strength of association

Which effect size measure is used for a 2x2 table in a chi-square test?

• Cohen's d

• Eta squared

• Phi

• Cramer's V

What does a p-value less than the alpha level indicate in a chi-square test?

• The null hypothesis is accepted

• The null hypothesis is rejected

• The test is inconclusive

• The sample size is insufficient

What is the typical alpha level used in chi-square tests?

• 20%

• 10%

• 1%

• 5%

According to the Survival Guide by Julie Pelant, what is considered a small to moderate effect size?

• 0.10

• 0.05

• 0.20

• 0.15