Socks in a drawer. In your sock drawer you have 4 blue, 5 gray, and 3 black socks. Half asleep one morning you grab 2 socks at random and put them on. Find the probability you end up wearing (a) 2 blue socks (b) no gray socks (c) at least 1 black sock (d) a green sock (e) matching socks

Simple Linear Regression Analyzing relationship between 2 variables X= hours studied Y=test score Response variable (y)= dependent variable Explanatory variable (x)= independent variable o Helper o Helps estimate mean of y’s Scatterplot used to identify o Patterns/ relationships o Outliers What regression line gives you o Line of means for y population o Prediction of the mean o Value of the regression equation is the “least squares” estimate of the mean of that y subpopulation Include units!! sample correlation coefficient, r Measures the strength of the LINEAR association between 2 quantitative variables P= population corr