Consider a test of H0 : 100 versus H1 : > 100. Suppose that a sample of size 20 has a sample mean of X = 105. Determine the p-value of this outcome if the population standard deviation is known to equal (a) 5; (b) 10; (c) 15.
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