1. Katrina measures the number of hours that everyone in her class studies on average for a final exam. She found that the scores were normally distributed with a mean of 4 hours and a standard deviation of 2 hours. What is the likelihood of randomly selecting a score that is more than 5 hours?
Please place your answer in the form of a percentage with two decimal places and a percent sign at the end.
2. Katrina measures the number of hours that everyone in her class studies on average for a final exam. She found that the scores were normally distributed with a mean of 4 hours and a standard deviation of 2 hours. What is the likelihood of randomly choosing a score that is less than 7 hours?
Please place your answer in the form of a percentage with two decimal places and a percent sign at the end.
3. Ralph measures the number of caffeinated beverages the people in his stats class average each day. He finds that the mean number for everyone is 4 with a standard deviation of 2.3. What are the chances that a person drawn at random from his stats class will drink fewer than 5 caffeinated beverage?
Please place your answer in the form of a percentage with two decimal places and a percent sign at the end.