1/4 because 6/24 can be simplified all the way down to 1/4
So,
(9 - 11) - (2 2/3 +6 1/3)
-2 - 10
-12
The change was of -12.
(The parentheses weren't needed, i just put 'em there)
Given:
Machine dispenser
Average = 600 mL soda to every glass
Volumes recorded in one day (random sampling)
600.15
599.92
599.85
599.92
599.81
600.14
600.04
599.98
Average = (sum of the volumes)/(number of readings)
= 4799.81/8
Average = 599.976 mL
Therefore there is sufficient evidence to conclude that the average volume of soda dispenser is different from 600 mL.
