Podcast
Questions and Answers
Which statistical test is used to assess the strength of the linear relationship between two variables?
Which statistical test is used to assess the strength of the linear relationship between two variables?
- Parametric test (correct)
- Chi-square test
- Non-parametric test
- T-test
What can we conclude if the relationship between two variables is found to not result from chance?
What can we conclude if the relationship between two variables is found to not result from chance?
- There is a non-linear relationship between the variables
- There is no relationship between the variables
- There is a weak linear relationship between the variables
- There is a strong linear relationship between the variables (correct)
Which type of data cannot be tested using the methods discussed in the first lesson?
Which type of data cannot be tested using the methods discussed in the first lesson?
- Discrete data
- Ordinal data
- Categorical data (correct)
- Continuous data
What type of test can be performed to test the relationship between categorical or discrete data?
What type of test can be performed to test the relationship between categorical or discrete data?
What are the most common hypotheses concerning correlation?
What are the most common hypotheses concerning correlation?
Which symbol represents the population correlation coefficient?
Which symbol represents the population correlation coefficient?
What type of hypotheses can be made concerning the population correlation coefficient?
What type of hypotheses can be made concerning the population correlation coefficient?
Which test statistic is used to test the independence of categorical or discrete data?
Which test statistic is used to test the independence of categorical or discrete data?
Which type of test is used to evaluate the correlation between two variables when the assumptions of a parametric test are not met?
Which type of test is used to evaluate the correlation between two variables when the assumptions of a parametric test are not met?
What can we use the information about the relationship between two variables for?
What can we use the information about the relationship between two variables for?
Which of the following is the correct formula for the sample correlation, rXY?
Which of the following is the correct formula for the sample correlation, rXY?
Which of the following is the correct formula for the t-test statistic for testing the null hypothesis H0: ρ = 0?
Which of the following is the correct formula for the t-test statistic for testing the null hypothesis H0: ρ = 0?
Which of the following is true about the t-test statistic for testing the null hypothesis H0: ρ = 0?
Which of the following is true about the t-test statistic for testing the null hypothesis H0: ρ = 0?
What is the degrees of freedom for the t-test statistic used to test the null hypothesis H0: ρ = 0?
What is the degrees of freedom for the t-test statistic used to test the null hypothesis H0: ρ = 0?
Which of the following is true about the significance of the t-test for a given sample correlation coefficient and sample size?
Which of the following is true about the significance of the t-test for a given sample correlation coefficient and sample size?
What is the critical value of the t-statistic for a two-sided alternative hypothesis at the 0.05 level?
What is the critical value of the t-statistic for a two-sided alternative hypothesis at the 0.05 level?
What is the critical value of the t-statistic for a one-sided alternative hypothesis at the 0.05 level?
What is the critical value of the t-statistic for a one-sided alternative hypothesis at the 0.05 level?
What is the sample size required for a sample correlation coefficient of r = 0.35 to yield a t-statistic just significant at the 0.05 level?
What is the sample size required for a sample correlation coefficient of r = 0.35 to yield a t-statistic just significant at the 0.05 level?
What is the sample correlation coefficient required for a sample size of n = 12 to yield a t-statistic not different from zero at the 0.05 level?
What is the sample correlation coefficient required for a sample size of n = 12 to yield a t-statistic not different from zero at the 0.05 level?
What is the name often used to refer to the parametric pairwise correlation coefficient?
What is the name often used to refer to the parametric pairwise correlation coefficient?
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