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The Tutor and Student reviewed the t-test for two related samples (repeated measures t-test), contrasting it with independent samples. They covered the calculation of difference scores, mean difference, and the hypothesis testing procedure, including stating hypotheses, locating critical regions, and calculating the t-statistic. The session concluded with working through a practical example of a stress reduction study.

The tutor introduced the t-test for two independent samples, covering its theoretical basis, hypothesis formulation, and computational procedures. They explained how to calculate t-statistics and standard errors, distinguishing between equal and unequal sample sizes and introducing the concept of pooled variance. The session also outlined the steps for hypothesis testing and the difference between one-tailed and two-tailed tests. The tutor planned to cover more formulas and potentially the Hartley F-max test in the next, mathematically intensive session.

The tutor introduced fundamental trigonometric concepts using right-angled triangles, defining perpendicular, base, and hypotenuse. The session covered the definitions and calculations of sine, cosine, and tangent, as well as the identities tan(A) = sin(A)/cos(A) and sin²(A) + cos²(A) = 1, with practical examples and problem-solving to reinforce understanding.

The session covered Chapter 9, focusing on t-statistics for hypothesis testing when population standard deviation is unknown, and introducing methods for measuring effect size like Cohen's D and R-squared. The Tutor and Student also discussed confidence intervals as a way to estimate population parameters and reviewed the upcoming study plan for Chapters 10 and 11.

The tutor introduced t-statistics as a method for hypothesis testing when the population standard deviation is unknown. They reviewed necessary statistical concepts and guided the student through the steps of performing a t-test, including calculating the t-statistic and determining the critical region. The next session is planned for more practice with t-tests.

The Tutor and Student concluded Chapter 8 of a Statistics course, covering directional hypothesis tests, effect size (Cohen's d), and statistical power. They practiced calculating z-scores and interpreting results in the context of hypothesis testing. The Tutor planned to share additional practice questions for the Student to solve before the next session.