Sogurt (2a) -Overall Air Quality in October 2005 and October 2010 (2b) -Overall Air Quality in March 2005 and March 2010

 (2a)

Names of group members: Mavis, Yi de, Toby
October 2005 Key-> 5I2 = 25

October 2005: Mean-> 36.7(1 D.P)
             Median-> 34
           Mode-> 29  

October 2010 Key-> 4I0 = 40
Mean-> 42.1 (1 D.P)
Median-> 40
Mode-> 29

Our group's conclusion is that the overall air quality in October (2005) was better than that of October (2010).

(2b)

                                                       2005                                    2010  
Names of group members : Mark, Kai En, Matthew
March 2005 Key-> 1I3 = 31

March 2005:  Mean-> 49
       Mode-> 51
          Median-> 49

March 2010 Key-> 3I4 = 34

March 2010:  Mean-> 37.8 (1 D.P)
        Mode-> 39
          Median->39

Our group's conclusion is that the overall air quality in March (2010) is worse than that of March (2005).

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