It is 2.4 hours I hope this helped! :)
Solution: We are given below data:

Now to find the mean deviation, we use the below formula:

Where:
represents the summation
X, represents the observation.
represents the mean
N represents the number of observation.


Therefore, the mean deviation is:

= 4
Answer:
All of them?!?!
Step-by-step explanation:
ill do a couple 1. 20% 12. 70% 26. 65% 17. 44%