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It is believed that at least 60% of the residents in a certain area favor an annexation suit by a neighboring city. What conclusion would you draw if only 120 in a sample of 210 voters favor the suit? Use a 0.03 level of significance. Need solution like in the picture attached

It is believed that at least 60% of the residents in a certain area favor an annexation suit by a neighboring city. What conclusion would you draw if only 120 in a sample of 210 voters favor the suit? Use a 0.03 level of significance. Need solution like in the picture attached

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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It is believed that at least 60% of the residents in a certain area favor an annexation suit by a neighboring city. What conclusion would you draw if only 120 in a sample of 210 voters favor the suit? Use a 0.03 level of significance. Need solution like in the picture attached
1. Ho u = 45, there is no increase in copies > 45, there is an increase in copies H, 2. a = 0.05 3. One tailed test 4. Critical region t = +2.92, df = 2 5. Test Statistic 47-45 T = = 3.47 www.com 1 √3 6. Decision: Reject Ho 7. Conclusion: The increase in copies in our samples is statistically significant. It is not the result of chance of variation.
Transcribed Image Text:1. Ho u = 45, there is no increase in copies > 45, there is an increase in copies H, 2. a = 0.05 3. One tailed test 4. Critical region t = +2.92, df = 2 5. Test Statistic 47-45 T = = 3.47 www.com 1 √3 6. Decision: Reject Ho 7. Conclusion: The increase in copies in our samples is statistically significant. It is not the result of chance of variation.
A certain printing press is known to turn out an average of 45 copies a minute. In an attempt to increase its output, an alteration is made to the machine, and then in 3 short test runs it turns out 46, 47, and 48 copies a minute. Is this increase statically significant, or is it likely to be simply the result of chance of variation? Use a significance level of 0.05
Transcribed Image Text:A certain printing press is known to turn out an average of 45 copies a minute. In an attempt to increase its output, an alteration is made to the machine, and then in 3 short test runs it turns out 46, 47, and 48 copies a minute. Is this increase statically significant, or is it likely to be simply the result of chance of variation? Use a significance level of 0.05
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