According to work done by Nick Wilson of Otago University Wellington, the proportion of individuals who cover their mouth when sneezing is 0.733. Mary is suspicious of the Wilson's findings and decides to test if there is enough evidence to conclude that the proportion is lower. Mary observes 100 randomly selected individuals sneeze and finds that 78 covered their mouth when sneezing. Does the sample evidence contradict Professor Wilson's findings at a 10% level of significance?
Hypothesis:
Test Statistic:
Analyze data (assuming H0 is true):
State a conclusion: