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April 18, 2015

April 18, 2015

Posted by **Anonymous** on Thursday, June 27, 2013 at 8:19pm.

- econ 112 -
**Kuai**, Thursday, June 27, 2013 at 9:14pmn1= 400

x1 = 130

n2 = 480

x1 = 187

phat1 = x1/n1 = 130/400 = .325

phat2 = x2/n2 = 187/480 = .3896

pbar = (x1 + x2)/(n1+n2) = (130 +187)/(400+480) = .36

qbar = 1- pbar = .64

z = (325- .3896)/sqrt(.36*.64/400+ .36*.64/480)

z = -1.99

If p-value greater than alpha

Fail to reject Ho

If p-value less than alpha

Reject Ho

p-value = 0.047

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