Podcast
Questions and Answers
What is the primary purpose of the null hypothesis in a research study?
What is the primary purpose of the null hypothesis in a research study?
- To provide an estimate of the population variance
- To calculate the sample size required for a study
- To prove that there is a real effect or relationship in the population
- is a statement that there is no effect or no difference between two variables or groups. It is the default or starting position that researchers aim to disprove through their study. (correct)
Which of the following statements is true about the null hypothesis?
Which of the following statements is true about the null hypothesis?
- It is usually stated as an inequality
- It is a statement that there is no effect or no difference between two variables or groups (correct)
- It represents the idea that there is a real effect or relationship in the population
- It is used to calculate the sample variance
What is the alternative hypothesis (H1 or Ha) in a research study?
What is the alternative hypothesis (H1 or Ha) in a research study?
- A statement that there is no effect or no difference between two variables or groups
- A measure of the spread or dispersion of values within a dataset
- A type of statistical analysis used to compare means
- A statement that there is an effect or relationship in the population (correct)
What is the main difference between sample variance and population variance?
What is the main difference between sample variance and population variance?
Why do researchers use statistical methods in psychology?
Why do researchers use statistical methods in psychology?
What is the primary reason why researchers reject the null hypothesis?
What is the primary reason why researchers reject the null hypothesis?
What is the purpose of significance testing?
What is the purpose of significance testing?
What happens to the sampling distribution of the mean as the sample size increases?
What happens to the sampling distribution of the mean as the sample size increases?
What does a small p-value indicate?
What does a small p-value indicate?
What is the purpose of the null hypothesis in significance testing?
What is the purpose of the null hypothesis in significance testing?
What is the relationship between the standard deviation of the sampling distribution and the sample size?
What is the relationship between the standard deviation of the sampling distribution and the sample size?
What is the primary role of the p-value in significance testing?
What is the primary role of the p-value in significance testing?
What does a larger p-value (greater than 0.05) indicate about the observed data?
What does a larger p-value (greater than 0.05) indicate about the observed data?
According to Gelman (2016), why is the replication crisis more prominent in psychology?
According to Gelman (2016), why is the replication crisis more prominent in psychology?
What is a common route to replication issues in research?
What is a common route to replication issues in research?
What is a consequence of psychology's focus on validity and reliability?
What is a consequence of psychology's focus on validity and reliability?
Why is the replication crisis more prominent in psychology, according to Gelman (2016)?
Why is the replication crisis more prominent in psychology, according to Gelman (2016)?
What is a result of overconfidence in research designs?
What is a result of overconfidence in research designs?
What is a key assumption about the distribution of population errors in statistical models?
What is a key assumption about the distribution of population errors in statistical models?
What is the main difference between a discrete variable and a continuous variable?
What is the main difference between a discrete variable and a continuous variable?
What is the primary goal of model building in statistical analysis?
What is the primary goal of model building in statistical analysis?
Why is it important to check descriptive statistics for signs of miscoding or other mistakes?
Why is it important to check descriptive statistics for signs of miscoding or other mistakes?
What is the primary difference between process models and statistical models?
What is the primary difference between process models and statistical models?
What is the typical structure of data in statistical analysis?
What is the typical structure of data in statistical analysis?
What can occur when researchers make a series of decisions during data analysis without pre-specifying an analysis plan?
What can occur when researchers make a series of decisions during data analysis without pre-specifying an analysis plan?
What is the purpose of preregistering hypotheses in a research study?
What is the purpose of preregistering hypotheses in a research study?
What is the formula for a (1−α) × 100% Confidence Interval for the population mean μ when the population standard deviation σ is known?
What is the formula for a (1−α) × 100% Confidence Interval for the population mean μ when the population standard deviation σ is known?
What is the term for the population standard deviation σ divided by the square root of the sample size n?
What is the term for the population standard deviation σ divided by the square root of the sample size n?
What is the value of α in the context of a 95% Confidence Interval?
What is the value of α in the context of a 95% Confidence Interval?
What is the purpose of using a Confidence Interval for the population mean μ?
What is the purpose of using a Confidence Interval for the population mean μ?