SOLUTION: In 1993​, one county reported that among 3108 white women who had​ babies,
139 were multiple births. There were also 15 multiple births to
626 black women. Does t
Algebra ->
Probability-and-statistics
-> SOLUTION: In 1993​, one county reported that among 3108 white women who had​ babies,
139 were multiple births. There were also 15 multiple births to
626 black women. Does t
Log On
Question 981815: In 1993, one county reported that among 3108 white women who had babies,
139 were multiple births. There were also 15 multiple births to
626 black women. Does this indicate any racial difference in the likelihood of multiple births?
What is the test statistic (z)? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! This is a two sample proportion test
Ho=proportions equal
Ha=proportions not equal.
alpha=0.05
test statistic;; z= [(phat1-phat2)-(p1-p2)]/sqrt{ ((p1)*(1-p1)/n1))+ ((p2)(1-p2))/n2)}
Critical value abs(z)>1.96
on the calculator
phat1=0.0447; p2hat=0.0234
z=2.38
Reject Ho; there is a difference.
