=+10. (**) Lazy B Ranch produces leather hides for use in the furniture and automotive upholstery industry. The company has taken 10 samples of nine observations each, measuring the square footage of each hide. Summary data are as follows:

MEAN (SQ FT)

(n 5 9) MINIMUM MAXIMUM 13.2 12.7 13.5 12.8 12.5 13.3 13.3 12.6 13.7 13.1 12.5 13.5 MEAN (SQ FT)

(n 5 9) MINIMUM MAXIMUM 12.7 12.2 13.0 12.9 12.5 13.3 13.2 12.9 13.5 13.0 12.6 13.6 13.1 12.7 13.4 12.7 12.3 13.5