Tóm tắt nội dung: C H A P T E R 6 General directions – summarizing data Chapter objectives This chapter will help you to: ■ ■ ■ ■ ■ ■ understand and use summary measures of location; the mode, median and arithmetic mean understand and use summary measures of spread; the range, quartiles, semi inter-quartile range, standard deviation, variance present order statistics using boxplots find summary measures from grouped data use the technology: summarize data in EXCEL,