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The table below shows height of 50 students

 Height (cm)  Frequency 
 140 – 144
 145 – 149
 150 – 154
 155 – 159
 160 – 164
 3
 16
 20
 10
 1
  1. State the modal class      
  2. Calculate the median height.   

1 Answer

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  1. Modal class 150 – 154 
  2.  
     Class  f  cf 
     140 – 144 
     145 – 149
     150 – 154
     155 - 159
     160 - 164
     3
     16
     20
     10
     1
     3
     19
     39
     49
     50
                                        B1 C.F
    M =
         modal class calculation
    =149.5 + (25 – 19) x 5
                          20                  M1 
    = 151
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