# s154l4.doc - Elementary Statistics: STAT154 – Fall 2018–...

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Elementary Statistics: STAT154 – Fall 2018– Lab4I. A doctor wanted to determine whether there was a relation between a male’s age andhis HDL (so-called “good”) cholesterol. He randomly selected 11 of his patients anddetermined their HDL cholesterol. He obtained the following data:Age:3842463255526161263866HDL:4754644645506258374462Use SPSS or any other software to answer the following questions.a. Draw a scatter diagram of the data treating age as the predictor variable and HDL asthe response variable. What type of relation, if any, appears to exist between age andHDL cholesterol?b. Compute the linear correlation coefficient between age and HDL cholesterol.Comment on the strength of the linear relationship using the correlation coefficient.c. Find the least-squares regression line treating age as the predictor variable and HDL asthe response variable.d. Interpret the intercept and the slope coefficient in the regression line in the context ofthe problem.

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