QUESTION 1 All else being equal, increasing the level of confidence desired will 0 Tighten the condence interval. O Decrease the margin of error. 0 Leave the margin of error unchanged. O Increase the margin of error. QUESTION 2 A human resources manager wishes to estimate the proportion of employees in her large company who have supplemental health insurance. What sample size should she select if she wants 95% confidence and a margin of error of 0.01? O 9604 O 3458 O 6765 O 4096