It is really helpful to start reading professional research articles to see how these concepts are used in actual study scenarios. Give it a try in the following article, where the researchers used the t-test to analyze the relationship between clinical simulation methodologies and student learning. Scherer, Y., Foltz-Ramos, K., Fabry, D., & Chao, Y. (2016). Evaluating simulation methodologies to determine best strategies to maximize student learning. Journal of Professional Nursing, 32(5), 349–357.

Look at Table 4 in the article. What was the average knowledge score on the pretest for the group that was going to observe first (Group B)?

N Mean Median Mode Standard deviation Variance Skewness Standard error of skewness Percentiles Valid Missing 25 50 224 20.0000 0.0000 16.6000 19.5000 20.0000 7.4438 55.4105 -0.9158 0.5121 9.7500 19.5000