Calculate the range, population variance, and population standard deviation for the following data set. If necessary, round to one more decimal place than the largest number of decimal places given in the data.

7,10,16,8,7,17,7,10,19,18

Range :

Population Variance :

Population Standard Deviation :

I think the range is 12 , the variance is 22.49, and the standard deviation is 4.7 or 5 ? I don't know I need help please ?