When and how are t-stats used?
When and how are f-stats used?

T-stats are used to measure the significance of the difference between two sample sets. The t-stat is used to compare the differences between the means of two samples to determine whether or not they are statistically significant. The value of the t-stat is used to determine the probability that the differences observed between the samples are due to chance. F-stats are used when comparing the variation within multiple groups to the variation between those groups. The F-stat is used to compare the variability between groups to the variability within groups. This can be used to determine whether the differences between the groups is statistically significant and the strength of the relationship between the groups.