Roland was driving to campus but realized that his car is out of gas. he started driving around syracuse looking for a gas station and comparing their gas prices, searching for the cheapest one. he drove by 50 different gas stations. he computed their average gas price to be $2.74 per gallon. last year around the same time in november, the average gas price in the entire of syracuse was $2.68 per gallon with the standard deviation of $0.11. let's assume that the standard deviation hasn't changed since last year. roland called his mom: roland: "mom, did you know that average gas prices have gone up since the same time last year? " mom: "are you sure, roland? " roland: "yes, mom, 95% sure." mom: "i don't think you're right." who is right? mom is right roland is right