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In a study of cell phone usage and brain hemispheric dominance an Internet survey was...

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In a study of cell phone usage and brain hemispheric dominance an Internet survey was e mailed to 6988 subjects randomly selected from an online group involved with ears There were 1339 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 OA Ho p 0 2 H p 0 2 OC Ho p 0 2 H p 0 2 O E Ho p 0 2 H p 0 2 0 Round to two decimal places as needed The test statistic is z The P value is Round to three decimal places as needed Because the P value is There is OB B Ho p 0 2 H p 0 2 O D Ho p0 2 H p 0 2 OF Ho p 0 2 H p 0 2 the significance level the null hypothesis evidence to support the claim that the return rate is less than 20

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