#### Answer

mean=7.9
median=7
mode=7
Range=12.
The mean is best to measure central tendency

#### Work Step by Step

You have the values:7,5,9,7,4,6,10,8,5,7,8,7,3,12,15,13,8
To find the mean, you have to add all the numbers together and divide by 17(amount of values):$\frac{7,5,9,7,4,6,10,8,5,7,8,7,3,12,15,13,8}{17}$=$\frac{134}{17}$$\approx$7.9.
To find the median you have to arrange the values from least to greatest (3,4,5,6,7,7,7,7,8,8,8,9,10,12,13,14) and find the middle value. The median is 7.
The mode is the number which repeats the most. The mode is 7.
The range is the largest number(15) minus the smallest number(3).15-3=12. The range is 12.
The mean would be the best measure of central tendency because there are no outliers.