Homework Help Forum: Statistics

Posted by Sam on Sunday, November 1, 2009 at 9:30pm.

Among employed women, 25% have never been married. Select 10 employed women at random. What is the mean number of women in such a sample who have never been married? What is the standard deviation? I think the mean would be 2.5, but I'm not sure about the standard deviation.

• Statistics - Pragyan, Monday, November 2, 2009 at 4:52am

  probability that the women was unmarried = p = 0.25 probability that she was married = q = 1-p = 0.75 sample size , n = 10 mean = np = 10 x 0.25 = 2.5 standard deviation = sq. root (npq) =1.37

  
  

Answer this Question

First Name:
School Subject:
Answer:

For Further Reading