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A poll of 2,096 randomly selected adults showed that 94% of them own cell phones. The technology display below results from a test of the
A poll of
2,096
randomly selected adults showed that
94%
of them own cell phones. The technology display below results from a test of the claim that
90%
of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a
0.05
significance level to complete parts (a) through (e).
Test of p=0.9 vs p0.9 | ||||||
---|---|---|---|---|---|---|
Sample | X | N | Sample p | 95% CI | Z-Value | P-Value |
1 | 1961 | 2,096 | 0.935592 | (0.925082,0.946101) | 5.43 | 0.000 |
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