Answer:
c) 1.3 hours.
Step-by-step explanation:
The mean of a data set is given by the sum of it's values divided by the number of values.
In this question, we have that:
Nine values.
The sum of them is:
1 + 1.1 + 1.2 + 1.2 + 1.3 + 1.4 + 1.4 + 1.4 + 1.5 = 11.5
The mean is
11.5/9 = 1.28
So closest to 1.3 hours, and the answer is given by option c.
