If researchers ask 260 middle school students to wear bright orange shoes to school for a day, and 192 of them were willing to wear them, then the overall proportion is 0.7384615.
The sample size
is 260, and the number of successes is 192. The sample proportion is calculated as 192/260 = 0.7384615.
Randomization ensures that there is an equal number of middle school students in each class. Randomization also eliminates the variation contributed by confounding variables
in the study. hope it helps you out