In 2010, 91% of households had at least one cell phone. A random sample of 300 households in each of 2 different counties, indicated the following. At the a = 0.01 level of significance, can it be concluded that a difference in proportions exists? n X Country Y Country Z 300 255 300 278

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 5E: List the sample space of each experiment. Rolling one die and tossing one coin
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In 2010, 91% of households had at least one cell phone. A random sample of 300
households in each of 2 different counties, indicated the following. At the a = 0.01 level
of significance, can it be concluded that a difference in proportions exists?
Country Y
Country Z
300
255
300
278
Transcribed Image Text:In 2010, 91% of households had at least one cell phone. A random sample of 300 households in each of 2 different counties, indicated the following. At the a = 0.01 level of significance, can it be concluded that a difference in proportions exists? Country Y Country Z 300 255 300 278
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