More smartphones: using the data presented, A: construct a frequency distribution for the total number of smartphones sold in each of the four quarters Jan-mar, Apr -Jun, Jul- Sep, and oct-Nov. B: construct a frequency bar graph C: construct a relative frequency distribution D: construct a relative frequency bar graph   E: construct a pie chart F: more than half of smartphones were sold were sold        between October and December Quarter  Number sold (in millions) Jan-mar. 2012 152.7 Apr-jun. 2012 156.2 Jul -Sep. 2012 179.7 Oct-Dec. 2012 227.8 Jan- Mar 2013 222.6 Apr-Jun 2013 253.3 Jul- Sep 2013 276.6 Oct-Dec 2013 292.7 Jan-Mar 2014 288.4 Apr-Jun 2014 302.1 Jul-Sep 2014 332.6 Oct-Dec 2014 377.8 Jan-Mar 2015 334.4 Apr-Jun 2015 337.2 Jul-Sep 2015 355.2 Oct-Dec 2015 399.5

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Bar Graphs

A bar graph is a chart or graphical representation of data. A bar chart, also known as a bar graph, is a graph or chart that displays categorical data using rectangular bars with heights or lengths equal to the values they represent. Typically, bar graphs show categorical and numerical variables grouped in class intervals. A bar graph is useful for comparing and analyzing a set of data.