For a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on students, and the distribution of total study hours per week is bell-shaped with a mean of 15 hours and a standard deviation of 2 hours. Use the Empirical Rule to answer the following questions. a) 99.7% of the students have study hours that are between and c) What percentage of the students have study hours that are above 13? [Round your answer to one decimal places.]

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For a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A survey
was done on students, and the distribution of total study hours per week is bell-shaped with a mean of 15
hours and a standard deviation of 2 hours.
Use the Empirical Rule to answer the following questions.
a) 99.7% of the students have study hours that are between
and
c) What percentage of the students have study hours that are above 13?
[Round your answer to one decimal places.]
Transcribed Image Text:For a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on students, and the distribution of total study hours per week is bell-shaped with a mean of 15 hours and a standard deviation of 2 hours. Use the Empirical Rule to answer the following questions. a) 99.7% of the students have study hours that are between and c) What percentage of the students have study hours that are above 13? [Round your answer to one decimal places.]
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