Use the 68-95-99.7 rule to solve the problem. at one college, gpa's are normally distributed with a mean of 3.4 and a standard deviation of 0.4. what percentage of students at the college has a gpa between 3.0 and 3.8?

Television viewing reached a new high when the global information and measurement company reported a mean daily viewing time of 8.35 hours per household. use a normal probability distribution with a standard deviation of 2.5 hours to answer the following questions about daily television viewing per household. a. what is the probability that a household views television between 4 and 10 hours a day? (to 4 decimals) b. how many hours of television viewing must a household have in order to be in the top 7% of all television viewing household? (to 2 decimals) c. what is the probability that a household views television more than 4 hours a day? (to 4 decimals)