When two births are randomly​ selected, the sample space for genders is​ bb, bg,​ gb, and gg. Assume that those four outcomes are equally likely. Construct a table that describes the sampling distribution of the sample proportion of girls from two births. Does the mean of the sample proportions equal the proportion of girls in two​ births? Does the result suggest that a sample proportion is an unbiased estimator of a population​ proportion? For the entire​ population, assume the probability of having a boy is ​, the probability of having a girl is ​, and this is not affected by how many boys or girls have previously been born.