A bird built a nest in the wreath on this front door (see picture below). All of the eggs in the wreath are blue like bluebird eggs. However, there are several birds that lay blue eggs. The length of blue bird eggs follows a normal distribution with an average of 2.1 cm and a standard deviation of 0.1 cm There are currently five eggs in this nest with the following lengths: 2.06 cm 2.101 2.08 1.94 2.12 cm cm cm cm