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BUS 217 Chapter 11 (partial)

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Two-Sample Tests of Hypothesis Chapter 11 11-1 Copyright ©2021 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. Learning Objectives LO11-1 Test a hypothesis that two independent population means are equal, assuming that the population standard deviations are known and equal 11-2 Copyright ©2021 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. Comparing Two Population Means   In comparing two populations, we wish to know whether their means could be equal We are investigating whether the distribution of the difference between the means could have a mean of 0 Examples  Is there a difference in the mean value of residential real estate sold by male agents and female agents in south Florida?  Is there an increase in the production rate after music is piped into the production area? 11-3 Copyright ©2021 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. Comparing Two Population Means (2 of 2)  We can use the following formula to compute z if the following conditions are met  The two populations follow normal distributions  The samples are from independent (unrelated) populations  The population standard deviations are known  11-4 In the z formula, xത1- xത2, is the difference ...
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