Section A ( 58 marks ) 1 . Consider the following frequency table .
Data 3 6 9 12 15 18 Frequency 12 20 12 8 4 4
( a ) ( i ) Write down the mode .
( ii ) Write down the median .
( b ) Find
( iii ) Find the range . [ 4 ]
( i ) the mean ;
( ii ) the variance . [ 4 ]
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