STINE & FOSTER CAR MODELS SOLD IN US

MOTIVATION You are looking for patterns to help determine what might affect mileage for different models of automobiles sold in the US You collect data for 233 models sold during 2003 and 2004 You want to identify any cars with superior mileage and then determine their characteristics

METHOD Use summary statistics (moment and order) to describe the distribution of horsepower Use a histogram to describe the shape of the distribution Use a boxplot to identify possible negative and positive outliers

MECHANICS Calculate the numerical statistics Draw a histogram Create a boxplot Bring your findings back into Excel and Powerpoint

HORSEPOWER FOR CARS meansd0%25%50%75%100%n Summary Statistics

MESSAGE Some cars have significantly more horsepower than others The distribution of horsepower is positively skewed The mean and the standard deviation could be strong influenced by the extremely large horsepower cars The narrowness of the interquartile range suggests that many of the cars have very similar horsepower