For a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 20 students, and the distribution of total study hours per week is bell-shaped with a mean of 14 hours and a standard deviation of 3.5 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95 % of the students spend between hours and hours on Statistics each week. c) 99.7% of the students spend between hours and hours on Statistics each week.

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Question 18
For a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A survey
was done on 20 students, and the distribution of total study hours per week is bell-shaped with a mean of
14 hours and a standard deviation of 3.5 hours.
Use the Empirical Rule to answer the following questions.
a) 68% of the students spend between
hours and
hours on Statistics each week.
b) 95% of the students spend between
hours and
hours on Statistics each week.
c) 99.7% of the students spend between
hours and
hours on Statistics each week.
Check Answer
Search for anything
a
近
Transcribed Image Text:Question 18 For a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 20 students, and the distribution of total study hours per week is bell-shaped with a mean of 14 hours and a standard deviation of 3.5 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and hours on Statistics each week. c) 99.7% of the students spend between hours and hours on Statistics each week. Check Answer Search for anything a 近
A set of exam scores is normally distributed with a mean =
Use the Empirical Rule to complete the following sentences.
82 and standard deviation = 4.
68% of the scores are between
and
95% of the scores are between
and
99.7% of the scores are between
and
Question Help: Video
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立
Transcribed Image Text:A set of exam scores is normally distributed with a mean = Use the Empirical Rule to complete the following sentences. 82 and standard deviation = 4. 68% of the scores are between and 95% of the scores are between and 99.7% of the scores are between and Question Help: Video Check Answer Search for anything 立
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