7, 8, 8, 8, 8, 9, 9, 10, 10, 11, 11 calculate the following measures for the data set: show your work. 11. mean 12. median 13. mode 14. range 15. based on past sales, which size does he sell the most? which measure of center (mean, median or mode) could you use to you determine this?
worth 20 points!

Step-by-step explanation:

Based on past sales, he sells most in size 8s.  You could use the mode to find this.

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)