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

Question

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

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6972 subjects randomly selected from an online group involved with ears. There were 1349 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. Upper H 0 : pequals0.2 Upper H 1 : pgreater than0.2 B. Upper H 0 : pequals0.2 Upper H 1 : pless than0.2 Your answer is correct.C. Upper H 0 : pless than0.2 Upper H 1 : pequals0.2 D. Upper H 0 : pnot equals0.2 Upper H 1 : pequals0.2 E. Upper H 0 : pequals0.2 Upper H 1 : pnot equals0.2 F. Upper H 0 : pgreater than0.2 Upper H 1 : pequals0.2

The test statistic is z

(Round to two decimal places as needed.)

Answers

The statistical software output for this problem is:

One sample proportion summary hypothesis test: Но : р 0.2 HA: P 0.2 Hypothesis test results: Proportion Prop. Std. Err Count

Hence,

Test statistic = -1.36


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