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Questions and Answers
What is the purpose of confidence intervals in statistics?
What is the purpose of confidence intervals in statistics?
- To describe the distribution of sample data
- To test hypotheses about population parameters
- To estimate population parameters based on sample data (correct)
- To make predictions about future data
What is the difference between a one-tailed and two-tailed hypothesis test?
What is the difference between a one-tailed and two-tailed hypothesis test?
- Two-tailed tests are only used for large sample sizes
- One-tailed tests have a smaller rejection region than two-tailed tests (correct)
- Two-tailed tests are more powerful than one-tailed tests
- One-tailed tests are more conservative than two-tailed tests
What is the purpose of multiple regression in statistics?
What is the purpose of multiple regression in statistics?
- To describe the relationship between two variables
- To test for a significant difference between two groups
- To estimate the mean of a population
- To predict the values of one variable based on another variable (correct)
