SOLUTION: Marketers believe that 60.33% of adults in the U.S. own a cell phone. A cell phone manufacturer believes a smaller proportion have a cell phone. 40 adults living in the U.S. are su

Question 1185072: Marketers believe that 60.33% of adults in the U.S. own a cell phone. A cell phone manufacturer believes a smaller proportion have a cell phone. 40 adults living in the U.S. are surveyed, of which, 29 report that they have a cell phone. Using a 0.05 level of significance test the claim.
The test statistic is_____
The p-value is______
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
this is a z-test , 1-sample proportion, 1-way.
the critical value is z < -1.645
p hat is 29/40=0.725. Right there the null hypotheses is not rejected
z=(0.725-0.6033) /sqrt (0.6033*0.3967/40)
=0.1217/0.0774
=1.57 test stat ANSWER
fail to reject Ho with p-value 0.942 ANSWER
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