Define the required probability for the normal distribution.
500 people were surveyed as well as asked to rate the NYC subway system with the rating scale of 1 (lowest to 5 (highest). The average rating was three with a standard deviation of 0.5.
1) describe what is the percentage of people surveyed that rated the subway system from 3 to 4
2) describe what is the percentage of people surveyed rated the Subway System from 1 to 3