A researcher believes that a greater proportion of construction companies in the northeast are using certified lumber in home construction projects compared to companies in the southeast.
She collected a random sample of 175 companies in the southeast and found that 76 used at least 30% certified lumber. She collected another random sample of 116 companies from the northeast and found that 67 used at least 30% certified lumber. Test the researcher’s claim that a greater proportion of companies in the northeast use at least 30% certified lumber compared to the southeast using α = 0.05. Round to three decimal places. Let z 0.05 = 1.645, z 0.1 = 1.28, z 0.025 = 1.96.

Question

A researcher believes that a greater proportion of construction companies in the northeast are using certified lumber in home construction projects compared to companies in the southeast. 
 She collected a random sample of 175 companies in the southeast and found that 76 used at least 30% certified lumber. She collected another random sample of 116 companies from the northeast and found that 67 used at least 30% certified lumber. Test the researcher’s claim that a greater proportion of companies in the northeast use at least 30% certified lumber compared to the southeast using α = 0.05. Round to three decimal places. Let z 0.05  = 1.645, z 0.1  = 1.28, z 0.025  = 1.96.

Answer

z 0  = −2, 407, fail to reject the null hypothesis.

Answer

z 0  = −2.394, reject the null hypothesis.

Answer

None of these.

Answer

z 0  = 2.394, fail to reject the null hypothesis.

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A researcher believes that a greater proportion of construction companies in th...

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