Question

find mean,median and mode for the given data 5 ,6 ,8 ,9, 10 11, 11, 12, 13, 13, 14 ,14 ,15 ,15, 16, 16 ,18 ,19 ,20

Answer 1

Mean : no. of observation/ frequency

= 5+6+8+9+10+11+11+12+13+13+14+14+15+15+16+16+18+19+20/19

= 245/19 = 12.89

Median : ( n+1/2) th term

= ( 19 +1 / 2) th term

= 20/2 = 10

Mode = highest frequency

= 11,13,14,15,16

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