Podcast
Questions and Answers
What is the purpose of hypothesis testing?
What is the purpose of hypothesis testing?
- To determine the population standard deviation
- To calculate the margin of error
- To determine the sample size needed for a study
- To determine if there is enough evidence to accept the null hypothesis (correct)
Which of the following best describes a Type I error?
Which of the following best describes a Type I error?
- Failing to reject the null hypothesis when it is true
- Incorrectly rejecting the null hypothesis when it is true (correct)
- Failing to reject the alternative hypothesis
- Correctly rejecting the null hypothesis when it is false
What symbol is used to represent the probability of making a Type II error?
What symbol is used to represent the probability of making a Type II error?
- Beta (β) (correct)
- Gamma (γ)
- Alpha (α)
- Delta (δ)
When does a Type II error occur?
When does a Type II error occur?
What does decreasing the significance level (?) chosen for a test impact?
What does decreasing the significance level (?) chosen for a test impact?
In testing hypotheses about a population mean using the z-statistic, what does H0 represent?
In testing hypotheses about a population mean using the z-statistic, what does H0 represent?
What trade-off exists between Type I and Type II errors?
What trade-off exists between Type I and Type II errors?
How does a lower alpha level impact Type II error?
How does a lower alpha level impact Type II error?
What symbol represents the probability of making a Type I error in hypothesis testing?
What symbol represents the probability of making a Type I error in hypothesis testing?
What does a higher power of a test mean in hypothesis testing?
What does a higher power of a test mean in hypothesis testing?
What is the purpose of determining the critical value in hypothesis testing?
What is the purpose of determining the critical value in hypothesis testing?
In a left-tailed test, when do we reject the null hypothesis?
In a left-tailed test, when do we reject the null hypothesis?
What is the formula to calculate the test statistic (t-score) when using the t-distribution?
What is the formula to calculate the test statistic (t-score) when using the t-distribution?
When conducting a hypothesis test for a population variance, what does the null hypothesis state?
When conducting a hypothesis test for a population variance, what does the null hypothesis state?
What is the purpose of determining the degrees of freedom in a t-test?
What is the purpose of determining the degrees of freedom in a t-test?
For a right-tailed test, when do we reject the null hypothesis?
For a right-tailed test, when do we reject the null hypothesis?
Which distribution is used when the population standard deviation is unknown?
Which distribution is used when the population standard deviation is unknown?
What is the significance level often set at in statistical hypothesis testing?
What is the significance level often set at in statistical hypothesis testing?
What is used to determine if there is a significant difference between the variance of a sample and a hypothesized population variance?
What is used to determine if there is a significant difference between the variance of a sample and a hypothesized population variance?
In a two-tailed test, what is the condition to reject the null hypothesis?
In a two-tailed test, what is the condition to reject the null hypothesis?
What does the null hypothesis represent in hypothesis testing?
What does the null hypothesis represent in hypothesis testing?
Which symbol is typically used to denote the null hypothesis?
Which symbol is typically used to denote the null hypothesis?
In a hypothesis test, what does the alternative hypothesis assert?
In a hypothesis test, what does the alternative hypothesis assert?
What does H1 represent in hypothesis testing?
What does H1 represent in hypothesis testing?
Which statement accurately describes the null hypothesis?
Which statement accurately describes the null hypothesis?
What purpose does the null hypothesis serve in hypothesis testing?
What purpose does the null hypothesis serve in hypothesis testing?
Which of the following best describes the alternate hypothesis?
Which of the following best describes the alternate hypothesis?
What role does statistical testing play in determining about hypotheses?
What role does statistical testing play in determining about hypotheses?
What does the default assumption imply about rejecting or failing to reject the null hypothesis?
What does the default assumption imply about rejecting or failing to reject the null hypothesis?
What statement accurately describes the relationship between H0 and H1?
What statement accurately describes the relationship between H0 and H1?
