Chosen at random, 500 rural and 500 urban people at age 65 or older are asked about their health and experience with prescription drugs. what can be bias?

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?