For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 22 students, and the distribution of total study hours per week is bell-shaped with a mean of 12 hours and a standa deviation of 2.8 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend betweenl 0.215 xhours hour and 14.785

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For a 4-unit class like Statistics, students should spend average of 12 hours
studying for the class. A survey was done on 22 students, and the distribution of
total study hours per week is bell-shaped with a mean of 12 hours and a standard
deviation of 2.8 hours.
Use the Empirical Rule to answer the following questions.
a) 68% of the students spend between 9.215
on Statistics each week.
Xhours and 14.785
hours
b) 95% of the students spend between 6.512
X hours and 6.512
X hours
on Statistics each week.
c) 99.7% of the students spend between 20.288 x hours and 20.288 x
hours on Statistics each week.
Transcribed Image Text:For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 22 students, and the distribution of total study hours per week is bell-shaped with a mean of 12 hours and a standard deviation of 2.8 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between 9.215 on Statistics each week. Xhours and 14.785 hours b) 95% of the students spend between 6.512 X hours and 6.512 X hours on Statistics each week. c) 99.7% of the students spend between 20.288 x hours and 20.288 x hours on Statistics each week.
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