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. Find the mean and standard deviation for the number of girls in 8 births.

Number of Girls x	P(x)
0	0.005
1	0.029
2	0.102
3	0.229
4	0.269
5	0.225
6	0.102
7	0.033
8	0.006