A study reported that in a sample of 104 people who watch television news, 35 had elevated diastolic blood pressure levels (in millimeters of mercury, or mmHg). In a sample of 74 people who do not watch television news, 20 had elevated diastolic blood pressure levels.
Can you conclude that the proportion of people with elevated diastolic blood pressure levels differs between news-watchers and those who do not watch news? Use the $\alpha = 0.05$ level significance.

Question

A study reported that in a sample of 104 people who watch television news, 35 had elevated diastolic blood pressure levels (in millimeters of mercury, or mmHg). In a sample of 74 people who do not watch television news, 20 had elevated diastolic blood pressure levels.
Can you conclude that the proportion of people with elevated diastolic blood pressure levels differs between news-watchers and those who do not watch news?  Use the $\alpha = 0.05$ level significance.

Quizplus · Accepted Answer

To determine if there is a significant difference in proportions, a hypothesis test for two proportions should be conducted. Without performing the actual statistical test (such as a z-test for proportions), we cannot conclude whether the difference is statistically significant at the $\alpha = 0.05$ level.

A Study Reported That in a Sample of 104 People α=0.05\alpha = 0.05α=0.05

A Study Reported That in a Sample of 104 People $\alpha = 0.05$