Question

Question Help Refer to the accompanying table, which describes results from groups of births from 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 ents Click the icon to view the data table. The mean isu- girl(s). (Round to one decimal place as needed.) The standard deviation is or girl(s). (Round to one decimal place as needed.)

Answer 1

P(X) X*P(x) X^2*P(x) 0 0.004 0 1 0.031 0.031 0.031 2 0.102 0.204 0.408 0.229 0.687 2.061 4 0.264 1.056 4.224 5 0.218 1.09 5.45 6 0.115 0.69 4.14 7 0.031 0.217 1.519 8 0.006 0.048 0.384 E(X) 4.023 18.217 E(X^2)

MEAN =E(X)=4.0

E(X^2)= 18.217

V(X)= 18.217-16

= 2.217

std= sqrt(2.217)= 1.5

As per the Q&A guidelines I have done the first question please re post the rest. Thank You