This document provides a comprehensive solution for QAB 105, a Quantitative Analysis for Business course assignment. The solution addresses key concepts including random sampling and calculating 95% confidence intervals. It delves into probability distributions, calculating various statistical values. Furthermore, the assignment solution tackles hypothesis testing, determining p-values and drawing conclusions based on significance levels. Finally, the document includes a detailed linear regression analysis, interpreting regression lines, slope coefficients, and assessing the strength of the relationship between variables using correlation coefficients and scatter plots, including references. The assignment is designed to help students understand and apply statistical methods in a business context.