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The difference between the minimum and maximum observation of a variable is called the a. interquartile Ob range Oc. mode O d. variable Clear my choice The difference in a variable measured over observations is called O a. a population Ob variation Oc. perception O d. a frequency distribution The average monthly price of regular gasoline in the United States was recorded for the years 1998-2005. Each year's distribution of average monthly regular gasoline prices is shown in the following box plots. Time left 0:23:52 U.S. Gas Prices by Year 300 250 Price in Cents 200 10 150 100 1999 1998 2000 2001 2002 2003 2005 2004 About what percentage of monthly gasoline prices in 2005 exceed all the other years' monthly gasoline prices? O a 25% Ob. 75% Oc50% Od 0% What would be the approximate shape of the following histogram? Relative Frequency 0.35 03 025 02 0.15 01 005 0 Bins a. Uniform b. Symmetrical Oc. Skewed left O d. Skewed right