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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?
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?
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