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Homework answers / question archive / Columbus State Community College STAT 1350: Elementary Statistics Normal Distribution 1)Students taking an introductory statistics class reported spending an average of $205 on textbooks that semester with a standard deviation of $60

Columbus State Community College

STAT 1350: Elementary Statistics

Normal Distribution

1)Students taking an introductory statistics class reported spending an average of $205 on textbooks that semester with a standard deviation of $60. A rough sketch of the histogram looked like:

- 68% of students spend between
__145__and__265__.

- 95% of students spend between
__85__and__325__.

- 99.7% of students spend between
__25__and__385__.

- Approximately what percentage of the students spent between $175 and $250 on textbooks that semester?

- One student spent $187 on textbooks. What percentage of the students spent less than she did on textbooks that semester?

- 10% of students spend less than
__$127__on textbooks.

- 35% of students spend more than
__$283__on textbooks.

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