In a population of bats living in a certain region, 30 percent have a wingspan greater than 10 inches. In a random sample of 80 bats living outside of the region, 20 had a wingspan greater than 10 inches. Consider a one-sample z-test to investigate whether there is evidence that the proportion of bats with a wingspan greater than 10 inches living outside the region is different from that of the bats living in the region. Which of the following is the correct test statistic? 2 0 0.25 0.30 0.25 2= 0.20 030 0.25 0.30 D

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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Author:HOLT MCDOUGAL
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Chapter11: Data Analysis And Probability
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In a population of bats living in a certain region, 30 percent have a wingspan greater than 10 inches. In a random sample of 80 bats living outside of the region, 20 had a wingspan greater than 10 inches. Consider a one-sample z-test to investigate whether there is evidence that the
proportion of bats with a wingspan greater than 10 inches living outside the region is different from that of the bats living in the region. Which of the following is the correct test statistic?
0.30-0.25
A
(0.25)(0.75)
0.30-0.25
B
(0.30)(0.70)
0.20-0.30
(0.30)(0.70)
0.25 0.30
(0.25)(0.75)
0.25 0.30
(0.30)(0.70)
Transcribed Image Text:In a population of bats living in a certain region, 30 percent have a wingspan greater than 10 inches. In a random sample of 80 bats living outside of the region, 20 had a wingspan greater than 10 inches. Consider a one-sample z-test to investigate whether there is evidence that the proportion of bats with a wingspan greater than 10 inches living outside the region is different from that of the bats living in the region. Which of the following is the correct test statistic? 0.30-0.25 A (0.25)(0.75) 0.30-0.25 B (0.30)(0.70) 0.20-0.30 (0.30)(0.70) 0.25 0.30 (0.25)(0.75) 0.25 0.30 (0.30)(0.70)
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