A poll of 2,160 randomly selec
A poll of 2,160 randomly selected adults showed that 92% ofthem own cell phones. The technology display below results from atest of the claim that 91% of adults own cell phones. Use thenormal distribution as an approximation to the binomialdistribution, and assume a 0.01 significance level to completeparts (a) through (e). Test of p=0.91 vs p≠0.91
Sample=1 x=1,981 n=2,160 sample p= .917130 95%CI=(0.901850,0.932409) z-value=1.16 p-value= .247
Answer:
Null hypothesis
Alternative hypothesis
We have for given example, Population proportion value is =0.91 x=1981 n=2160 Level of significance = 0.01 Estimate for sample proportion = 0.917130 Z test statistic formula for proportion P-value =0.247 ………………………by usingExcel command =2*(1-NORMSDIST(1.16)) or by using Z table. Decision:Do not reject H0