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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

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

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
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A "12 0z” jar of a local brand of peanut is less than this value. The Better Business bureau selected a sample of 20 jars. The sample showed an average net weight of 11.80 ounces and a standard deviation of 0.4 ounce. Using a 0.02 level of significance, what would the Bureau conclude about the operation of the local firm? Solution like in the picture ty
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
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.
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