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A poll of 2 comma 047 randomly selected adults showed that 94% of them own cell...
A poll of 2 comma 047 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the claim that 95% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts (a) through (e). Test of pequals0.95 vs pnot equals0.95 Sample X N Sample p 95% CI Z-Value P-Value 1 1933 2 comma 047 0.944309 (0.931253,0.957365) negative 1.18 0.237 a. Is the test two-tailed, left-tailed, or right-tailed?
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