Quiz on Choosing the Right Statistical Test

What is the primary purpose of statistical tests?

• To determine the average of a dataset

• To establish a relationship between variables

• To collect data from experiments

• To visualize data trends

What does a p-value indicate in hypothesis testing?

• The size of the sample

• The probability of observing the data if the null hypothesis is true

• The average of the test statistic

• The number of variables in the test

Which assumption is NOT commonly made by statistical tests?

• Random sampling of data

• Normality of data

• Homogeneity of variance

• Independence of observations

What type of variable is represented by the number of trees in a forest?

• Continuous

• Ordinal

• Discrete

• Categorical

Which statistical test is used to compare the means of two groups?

• Kruskal-Wallis H

• ANOVA

• Independent t-test

• Logistic regression

What is the main focus of regression tests?

• To check for correlations between variables

• To test hypotheses about categorical data

• To establish cause-and-effect relationships

• To find differences among group means

Which of the following is a type of nonparametric test?

• Paired t-test

• ANOVA

• Spearman’s r

• Multiple linear regression

What does the term 'statistical significance' refer to?

• The number of variables tested

• The average value of the test statistic

• The likelihood that the observed results occurred by chance

• The size of the sample used in the test

Which type of variable represents group names?

• Continuous

• Quantitative

• Discrete

• Categorical

What is the purpose of a Chi-square test of independence?

• To determine correlation between two continuous variables

• To analyze variance among groups

• To assess the relationship between two categorical variables

• To compare means of two groups