use the data in the table,and plot the average maximum, minimum temperatures on a graph
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Average=sum of observation divided by number of observation
=> Sum of maximum temperature is 28+32+35+38+39+34+31+30+31+31+28+28 = 385
=> number of observation is 12
=> AVERAGE of maximum temperature is 385/12 = 32.08333333.....
=>Sum of the minimum temperature is 16+18+21+24+26+24+23+22+22+21+17+15=249
=> number of observation is 12
=> AVERAGE of minimum temperature is 249/12 = 20.75
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