The USA Today claims that 44% of adults who access the Internet read the international news online. You want to check the accuracy of their claim by surveying a random sample of 120 adults who access the Internet and asking them if they read the international news online. Fifty-two adults responded "yes." Use a 95% confidence interval to test the newspaper's claim.
95% confidence interval for p is
- Z * Sqrt(( 1 -) / n) < p < + Z * Sqrt(( 1 -) / n)
0.52 - 1.96 * Sqrt( 0.52 * 0.48 / 120) < p < 0.52 + 1.96 * Sqrt( 0.52 * 0.48 / 120)
0.431 < p < 0.609
95% C I is ( 0.431 , 0.609)
Since Claimed proportion is inside the confidence interval, we have sufficient evidence to support the claim.
The USA Today claims that 44% of adults who access the Internet read the international news online
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