1. A new vitamin supplementation program is intended to decrease average resting heart rate in individuals at risk for hypertension. Assume that a team of researchers are hopeful that resting heart rate in their population will get down to less than 68 bpm, in a population with a standard deviation of 2 bpm. In order to test this goal reduction, the team gathers a SRS of 273 participants in their program and calculates a sample average resting heart rate of 74 bpm.

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

Sample mean =

1. Is the supplementation program successful in meeting their goal reduction in resting heart rate? (Yes or No)