20 Questions
Which type of statistical analysis is used to compare the averages of two groups and determine if the differences between them are more likely to arise from random chance?
t-test
What distribution does the test statistic follow under the null hypothesis in a t-test?
Normal distribution
When does the test statistic in a t-test follow a Student's t distribution?
When the scaling term is estimated based on the data
What is the most common application of a t-test?
Comparing means of two populations
When was the t-distribution first derived as a posterior distribution?
1876
Which statistical test is used on paired nominal data?
McNemar's test
What does sensitivity measure in a diagnostic test?
The ability to correctly identify people with the disease
What does specificity measure in a diagnostic test?
The ability to correctly identify people without the disease
What is the purpose of the transmission disequilibrium test?
To detect linkage disequilibrium in genetics
What is the name of the person who introduced McNemar's test?
Quinn McNemar
Which type of data is McNemar's test used for?
Nominal data
What does McNemar's test determine in a 2x2 contingency table?
Equality of row and column marginal frequencies
What are the commonly used parameters to assess a diagnostic test in medical sciences?
Sensitivity and specificity
What does sensitivity measure in a diagnostic test?
Ability to correctly identify people with the disease
What does specificity measure in a diagnostic test?
Ability to correctly identify people without the disease
Which of the following statements about Kendall's W is true?
Kendall's W is used to assess agreement among raters.
What does a Kendall's W of 0 indicate?
No overall trend of agreement among respondents.
In what range does Kendall's W lie when there is complete agreement among respondents?
0 to 1
What is Kendall's W used for?
Evaluating inter-rater reliability.
What does a Kendall's W of -1 indicate?
Complete disagreement among respondents.
Test your knowledge on t-tests and statistical analysis methods used to compare the averages of two groups. Learn about the concept of random chance and how it affects the results. Explore the application of t-distribution in hypothesis testing.
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