Question

standard deviation of three numbers 9 10 and 11standard deviation of 4 numbers 9 11 13 15​

Answer 1

Answer:

Given numbers are 7,9,11,13,15

Mean of given numbers =

5

7+9+11+13+15

=11

Standard deviation=

5

∣7−11∣+∣9−11∣+∣11−11∣+∣13−11∣+∣15−11∣

=2.4