I'm currently doing a lab assigneknt, however I can't figure out what the range is, which is asked for in the bottom left corner. How do I solve this?

Name: Section: Part 3 Unknown Number Sotikm chbride Mass of Flask with stopper 123.7479 Initial Buret reading 0,00mL Show your calculation of the standard deviation, s, from d2 below: NetvelumeS=66+12+18+24+30+36=21=n1d2=52332.14=476.428=21.827 Mean value (x):21 Standard Deviation (s): Range: \% NaCl from Table