12 Questions
What is the most widely used statistical test in HCI and related fields?
T-test
What are the scores used to compute the means and standard deviations?
The time taken for each participant to select items from a menu
What is the standard deviation?
A statistical measure of the spread or variability around the mean
What is the null hypothesis?
The hypothesis that there is no significant difference between the means of two conditions
What is the t-value?
The score derived from applying the t-test
What does df stand for in a t-test result?
Degrees of freedom
How is df calculated?
By summing the number of participants in one condition minus 1 and the number of participants in the other condition
What does p represent in a t-test result?
The probability that the effect found did not occur by chance
What is a typical value of p considered good enough to reject the null hypothesis?
p < 0.05
What is the formula to calculate df?
df = Na + Nb - 1
What is the significance of a p-value of 0.05?
There is a 5% chance that the effect found is due to chance
What is the alternative hypothesis?
The hypothesis that there is a significant difference between the means of two conditions
Test Your Knowledge on T-Tests in HCI and Psychology Take this quiz to evaluate your understanding of t-tests, the most commonly used statistical test in HCI and psychology. This quiz will cover the basics of computing means and standard deviations from scores, as well as interpreting t-test results to determine the probability of a result occurring by chance. Sharpen your skills in statistical analysis and gain confidence in your ability to apply t-tests in your research.
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