Statistics
Step-by-step worked solutions for statistics homework: hypothesis tests, regression, probability, and data analysis.
A worked chi-square goodness-of-fit test on daily coffee sales counts. Sets up the null, computes expected frequencies, calculates the statistic, looks up critical value, and interprets at the 5% level.
Worked solutions for five SPSS-based exercises: paired t-test on advertising campaign effectiveness, Kruskal-Wallis test for teaching assistant performance, independent t-test comparing university grades, one-way ANOVA on social media marketing, and two-way ANOVA examining the beer goggles effect with gender interaction.
A comprehensive regression project analyzing NFL team valuations and operating income. Includes population and sample descriptive statistics, correlation analysis, 95% confidence intervals, and simple linear regression with forecasting. Compares N=32 population to n=11 random sample.
