Question

Hi guys ,
please help me with this question.
please answer my question. First answer will be brilliant if it was right answer.
Answer:mean=12.17, median=12.5
I need the explanation friends​

Answer 1

answer:-- mean=12.17 median=12.5

Step-by-step explanation:

1. mean

Given,. no. of girls,. n=6

we know

$mean = \frac{sum \: of \: all \: observation}{number \: of \: observation}$

i.e.

$mean = \frac{9 + 10 + 12 + 13 + 14 + 15}{6}$

i.e.

$mean = \frac{73}{6} = 12.17(approx)$

(ii) median

first arrange observations in ascending order

i.e.

9,10,12,13,14,15

Since,. no. of observation , n= 6

so,

$median = \frac{ (\frac{n}{2}) {}^{th} term + ( \frac{n}{2} + 1) {}^{th} term}{2}$

i.e.

$median = \frac{ (\frac{6}{2}) {}^{th} term + ( \frac{6}{2} + 1) {}^{th} term}{2}$

i.e.

$median = \frac{3 {}^{th} term + 4 {}^{th}term }{2}$

i.e

$median = \frac{12 + 13}{2} = 12.5$

hope it helps