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The following frequency distribution shows the monthly consumption of electricity of $60$ families living in a society :
Find the mean and median of the given data.
Find the mean and median of the given data.
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Correct table (2 Marks)
Mean $= A + \frac{\sum f_i u_i}{\sum f_i} \times h = 550 + \frac{7}{60} \times 100$ (1 Mark)
$= 561.67$ (approx.) (1/2 Mark)
Median $= l + \frac{\frac{n}{2} - cf}{f} \times h = 500 + \frac{30 - 19}{18} \times 100$ (1 Mark)
$= 561.11$ (approx.) (1/2 Mark)
Mean $= A + \frac{\sum f_i u_i}{\sum f_i} \times h = 550 + \frac{7}{60} \times 100$ (1 Mark)
$= 561.67$ (approx.) (1/2 Mark)
Median $= l + \frac{\frac{n}{2} - cf}{f} \times h = 500 + \frac{30 - 19}{18} \times 100$ (1 Mark)
$= 561.11$ (approx.) (1/2 Mark)