Practical Business Statistics

analysis annual April arithmetic mean assets bank bar chart base box head calculated calendar day cent Chapter class intervals coefficient column commodities compared comparison computed correlation cycles cyclical data of Table deposits DOLLARS equation February Federal Reserve figures fitted fluctuations forecast frequency distribution Gantt charts geometric geometric mean graphic Graybar Electric Company illustrated incandescent lamps income increase index numbers indicate J. C. Penney Company January July June kilowatt hours large number logarithmic manufactures measure median method mid-value month monthly Motors Corporation moving average normal curve number of items obtained percentages period plotted pounds price changes price index procedure production ratio reference relative sales of incandescent sales per calendar sample schedule seasonal index shown in Chart shows skewed soap standard deviation statistical statistician straight line stub tensile strength tion trend United variable variations vertical scale weights York zero ΣΧ