Question

find the sum of deviations of all observations of the data 5, 8, 10, 15, 22 from their mean

Answer 1

5+8 +10+15 +22/5 = 60/5 = 12.
Mean =12.

Answer 2

$\huge{\underline{\bigstar{\sf{solution !!}}}}$

$\large{\boxed{\sf{5x-2y=0}}}$

5, 8, 1, 15, 22

Mean=  No. of observation/sum of observation

= 5+8+10+15+22/5

= 60/5

$\large{\boxed{\sf{=12}}}$

Sum of deviations

=∣5−12∣+∣8−12∣+∣10−12∣+∣15−12∣+∣22−12∣

=∣7∣+∣−4∣+∣−2∣+∣3∣+∣10∣

=7+4+2+3+10

$\large{\boxed{\sf{=26}}}$