Statistical tests

The data is parametric, categorical

• Paired t-test

• unpaired t-test

• Wilcoxon rank-sum (Mann u)

• Chi-squared test

Paired, parametric

• Paired t-test

• Wilcoxon signed-rank

• Chi-squared

• Unpaired T-test

Paired, non-parametric

• Paired t-test

• Wilcoxon signed-rank

• Wilcoxon rank-sum (mann-U)

• Chi-squared

Unpaired, non-parametric.

• Unpaired t-test

• Chi-squared

• Wilcoxon signed-rank

• Wilcoxon Rank-sum (Mann U)

Unpaired Parametric

• Unpaired t-test

• Wilcoxon Signed-rank

• Wilcoxon rank-sum (Mann u)

• Chi-squared

A university professor wants to test if students sleep fewer hours the night before an exam compared to their usual sleep schedule. She records the sleep duration of 20 students on a normal night and the night before an exam.

Which statistical test should she use?

• A) Unpaired t-test
  
  
  

• B) Wilcoxon rank-sum (Mann-Whitney U)

• C) Wilcoxon signed-rank

• D) Chi-squared test

A researcher wants to compare the reaction times of two independent groups: 15 participants who drank coffee and 15 who did not. The reaction times follow a normal distribution.

Which statistical test should be used?

• A) Paired t-test

• B) Unpaired t-test

• C) Wilcoxon signed-rank

• D) Chi-squared test

A doctor measures the blood pressure of 12 patients before and after they take a new medication. She wants to determine if the medication significantly changes blood pressure. The data is normally distributed.

Which statistical test should she use?

• A) Wilcoxon rank-sum (Mann-Whitney U)

• B) Paired t-test

• C) Unpaired t-test

• D) Chi-squared test

A researcher surveys 200 households to find out if dog owners are more likely than cat owners to have pet insurance. She creates a contingency table of pet type vs. insurance status.

Which statistical test should she use?

• A) Paired t-test

• B) Unpaired t-test

• C) Chi-squared test

• D) Wilcoxon signed-rank

A scientist tests two fertilizers on 30 plants. Each plant receives one fertilizer, and their heights are measured after 6 weeks. The data is not normally distributed.

Which statistical test should she use?

• A) Wilcoxon rank-sum (Mann-Whitney U)

• B) Paired t-test

• C) Unpaired t-test

• D) Wilcoxon signed-rank