3.5 Decreasing sampling variability. You plan to take a sample of size 500 to estimate the proportion of students at your school who support having no classes and special presentations on Veteran's Day. To be twice as accurate with your results, you should plan to sample how many students? (Hint: Use the quick and approximate method for the margin of error.) 198 a. 125 students b. 250 students c. 1000 students d. 2000 students