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A 2010 survey asked 827 randomly sampled registered voters in California if they

ID: 3230613 • Letter: A

Question

A 2010 survey asked 827 randomly sampled registered voters in California if they support or oppose coastal drilling for oil and natural gas. The results of the responses are summarized in the contigency table below.

College

degree

Yes

No

Support

154

132

View on drilling

Oppose

180

126

Don't know

104

131


You perform a chi-squared test for independence on these data to determine if there is an association between having a college degree and one's view on drilling for oil and natural gas. You find that the chi-squared statistic is 11.46 for these data. What is the p-value for this hypothesis test?

Select one:

a. Less than 0.001

b. Between 0.001 and 0.005

c. Between 0.005 and 0.01

d. Between 0.01 and 0.02

e. Between 0.02 and 0.05

College

degree

Yes

No

Support

154

132

View on drilling

Oppose

180

126

Don't know

104

131

Explanation / Answer

2 = 11.46

Degrees of freedom = (m - 1)(n - 1) = (3 - 1)(2 - 1) = 2

p- value = CHIDIST(11.46, 2) = 0.0032

Option (b).

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