Diseased Seedlings An experiment involves groups of four seedlings grown under controlled conditions. The random variable x is the number of seedlings in a group that meet specific criteria for being classified as “diseased.”

x P(x)

0 0.805 1 0.113 2 0.057 3 0.009 4 0.002 Genetics. In Exercises 13–18, refer to the accompanying table, which describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children.

Number of Girls x P(x)

0 0.004 1 0.031 2 0.109 3 0.219 4 0.273 5 0.219 6 0.109 7 0.031 8 0.004