9.Construct a 95% confidence interval of the population proportion using the given information.

x=80,n=200

(chart at the bottom)

Click here to view the table of critical values.

The lower bound is ?

The upper bound is ?

(Round to three decimal places asneeded.)

Chart

Level of Confidence(1-a) *100

90%

95%

99%

Area in Each Tail (a/2)

0.05

0.025

0.005

Critical Value (Z a/2)

1.645

1.96

2.575