Final answer:
The data set that is the most spread from its mean is -49, 17, 4, 18. Therefore correct option is C
Step-by-step explanation:
The data set that is the most spread from its mean is:-49, 17, 4, 18
To determine the spread of a data set, we can look at the standard deviation. The standard deviation tells us how far the data values are from the mean. In this case, the mean of the data set is 15 and the standard deviation is 4.3. The data set with the largest standard deviation is -49, 17, 4, 18, which means it is the most spread from its mean.