In a study of cell phone usage and brain hemispheric​ dominance, an Internet survey was​ e-mailed to 6999 subjects randomly selected from an online group involved with ears. There were 1297 surveys...




In a study of cell phone usage and brain hemispheric​ dominance, an Internet survey was​ e-mailed to
6999

subjects randomly selected from an online group involved with ears. There were
1297

surveys returned. Use a 0.01 significance level to test the claim that the return rate is less than​ 20%. Use the​ P-value method and use the normal distribution as an approximation to the binomial distribution.




Identify the null hypothesis and alternative hypothesis.







A.



H0​: p<>



H1​: p=0.2







B.



H0​: p=0.2



H1​: p>0.2







C.



H0​: p=0.2



H1​: p≠0.2







D.



H0​:p≠0.2



H1​: p=0.2







E.



H0​:p>0.2



H1​: p=0.2







F.



H0​: p=0.2



H1​: p<>






The test statistic is
z=_____________


​(Round to two decimal places as​ needed.)

The​ P-value is
________________


​(Round to three decimal places as​ needed.)


Because the​ P-value is (1) _______________the significance​ level, (2) ___________ the null hypothesis. There iS (3)  evidence to support the claim that the return rate is less than​ 20%.





(1)



greater than OR



less than







(2)



reject OR



fail to reject







(3)



sufficient OR



insufficient







Jun 01, 2022
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