1. Suppose a researcher is interested in the relationship between periodontal disease and a number of negative health outcomes. One outcome of particular interest to the researcher is hypertension (assume defined as systolic blood pressure above 140 mmHG). Suppose a team gathers 348 participants with periodontal disease and finds the sample average systolic blood pressure to be 157 mmHG. Standard deviation is 16

1. Calculate the Z-statistic (95% confidence level)

1. Is a relationship between periodontal disease and hypertension in this population.? (Yes or No)