In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6958 subjects randomly selected from an online group involved with ears. There were 1334 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. a) Identify the null hypothesis and alternative hypothesis. b) The test statistic is z= c) The P-value is
In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6958 subjects randomly selected from an online group involved with ears. There were 1334 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
a) Identify the null hypothesis and alternative hypothesis.
b) The test statistic is z=
c) The P-value is
d) Because the P-value is __(greater than/less than)_______ the significance level, ___(fail to reject/reject)_____ the null hypothesis. There is __(enough/not enough)_____ evidence to support the claim that the return rate is less than 20%.
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