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Answer
$Q_1=3.14$ Celsius, $M=6.4$ Celsius, $Q_3=9.75$ Celsius, $j=0.014$
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$\text{20 27 31 34 39 41 22 28 31 16}$
$\text{21 29 38 24 30 24 26 17 30 22}$
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$(ii)$ Obtain 'less than' and 'more than' type cumulative frequency distribution.
$(iii)$ If standard of passing is $20$ marks, then how many students have failed ?
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