17 Questions
What is a characteristic of the t-statistic?
It does not require prior knowledge of the population mean or variance.
What is the primary reason researchers prefer ANOVA over multiple t-tests?
To reduce the risk of Type I errors
What is the null hypothesis stating in the given example?
The average opinion in the population is neutral.
What is the term for the overall risk of a Type I error from all tests in an experiment?
Experimentwise alpha level
What is the purpose of using a sample in hypothesis testing?
To make inferences about the population.
What happens to the overall risk of a Type I error when conducting multiple hypothesis tests?
It increases as the number of tests increases
What is the underlying distribution of the population in the example?
Normal Distribution.
Why do researchers focus on a single or a few alternative hypotheses?
Based on theoretical predictions or previous research findings
What is the alpha level in a hypothesis test?
The probability of a Type I error
What is the sample size in the given example?
𝑛𝑛 = 9.
Why do researchers need to consider the experimentwise alpha level?
To account for the increased risk of Type I errors from multiple tests
What is the mean of the cognitive alertness test in the general population?
𝜇𝜇 = 50.
What is the expected value of the F-ratio when the null hypothesis holds?
Around 1.00
What is the purpose of the three conditions in the research study?
To compare the effectiveness of different learning strategies
What is the significance of 𝑎𝑎 = .05 in the research study?
It is the alpha level
What is assumed about the distribution of the data in the research study?
It follows a normal distribution
What is the primary goal of hypothesis testing in the research study?
To determine whether the null hypothesis is true or false
Understand the role of alternative hypotheses in research, including the importance of specifying a single or few alternatives based on theoretical predictions or previous research findings.
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