The height (in cm) of 8 girls of a class are 140, 142, 135, 137,150,148 and 138 respectively. Find the mean height of these girls and their median height.

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Solution

Arranged data $\to 135, 137, 138, 140, 142, 148, 150$
$N = 7$ , So, Medium $= {(\frac{7 + 1}{2})}^{t h}$ then $= 4^{t h}$ then $= 140 c m$
$¯ ¯ ¯ x =$ Mean $= \frac{\sum x}{N} = \frac{990}{7} = 141.42 c m$

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The height (in cm) of 8 girls of a class are 140, 142, 135, 137,150,148 and 138 respectively. Find the mean height of these girls and their median height.

Arranged data →135,137,138,140,142,148,150N=7, So, Medium =(7+12)th then =4th then =140cm¯¯¯x= Mean =∑xN=9907=141.42cm

Arranged data $\to 135, 137, 138, 140, 142, 148, 150$
$N = 7$ , So, Medium $= {(\frac{7 + 1}{2})}^{t h}$ then $= 4^{t h}$ then $= 140 c m$
$¯ ¯ ¯ x =$ Mean $= \frac{\sum x}{N} = \frac{990}{7} = 141.42 c m$