Question

(4) The heights (in cm) of 11 girls of a class is given below. Find the mean of the given data: 125, 138, 145, 118, 122, 127, 133, 140, 143, 117, 144 ​

Answer 1

Step-by-step explanation:

Solution:

i) Height of tallest girl = 151 cm

141.4 and 5 girls

ii) Height of shortest girl = 128 cm

iii) Range = Height of tallest girl - shortest girl

iv) Mean height = \frac{Sum\ of\ all\ heights}{Number\ of\ girls}

= \frac{135\ +\ 150\ +\ 139\ +\ 128\ +\ 151\ +\ 132\ +\ 146\ +\ 149\ +\ 143\ +\ 141}{10}\ =\ \frac{1414}{10}

= 141.4 cm

v) Number of girls having more height than the mean height

= 5 girls.