Offshore Drilling

Offshore drilling. A survey asked 827 randomly sampled registered voters in California “Do you support? Or do you oppose? Drilling for oil and natural gas off the Coast of California? Or do you not know enough to say?” Below is the distribution of responses, separated based on whether or not the respondent graduated from college.26

(a) What percent of college graduates and what percent of the non-college graduates in this sample do not know enough to have an opinion on drilling for oil and natural gas off the Coast of California?

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(b) Conduct a hypothesis test to determine if the data provide strong evidence that the proportion of college graduates who do not have an opinion on this issue is different than that of non-college graduates.

College Grad Yes No

Support 154 132 Oppose 180 126 Do not know 104 131 Total 438 389

Offshore drilling, Results of a poll evaluating support for drilling for oil and natural gas off the coast of California were introduced in Exercise 6.23.

College Grad Yes No

Support 154 132 Oppose 180 126 Do not know 104 131 Total 438 389

(a) What percent of college graduates and what percent of the non-college graduates in this sample support drilling for oil and natural gas off the Coast of California?

(b) Conduct a hypothesis test to determine if the data provide strong evidence that the proportion of college graduates who support off-shore drilling in California is different than that of non-college graduates.

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