As player salaries have increased, the cost of attending baseball games has increased dramatically. The file BBcost2011 contains the cost of lour tickets, two beers, four soft drinks, four hot dogs, two game programs, two baseball caps, and the parking fee for one car for each of the 30 Major League Baseball teams in 2011:

Decide whether the data appear to be approximately normally distributed by
a. Comparing data characteristics to theoretical properties.
b. Constructing a normal probability plot.