The purpose of the next activity is to give you guided practice in solving real-world problems involving a binomial random variable. Left-handedness Roughly 10% of all college students in the United States are left-handed. Most academic institutions try to have at least a few left-handed chairs in each classroom. 225 students are about to enter a lecture hall that has 30 left-handed chairs for a lecture. What is the probability that this is not going to be enough; in other words, what is the probability that more than 30 (or at least 31) of the 225 students are left-handed? 1. How should you write the initial probability? P(x > 30) 2. Based on on our "rule of thumb", is the normal approximation appropriate? Yes + np and nq = 3. What is the continuity of correction? P(r (click to hide hint)