Question

given below are the heights of 15 girls of a school in centimetre 148,128,146,143,152,139,140,142,149,154,132,157,165,139,142arrange the above data in ascending order and find
a)height of the tallest girl
b) the height of the shortest girl
c)the mean height

Answer 1

Height of tallest girl:165cm
Height of shortest girl:128cm
The mean height:
Mean=Sum of observations/No.of observations
=2176/15
=145.06

Answer 2

Ascending order will be :
128,132,139,139,140,142,142,143,146,148,149,152,154,157,165.
Tallest girl has height 165 cm
shortest girl has height 128 cm
Mean height =sum of total height /total number of girls
=2176/15
=145.06
ANS : Mean height =145.06 cm

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Hope it will help.
Thank you.