Suppose a Normal Model Describes the Number of Pages Printer

question 34

Multiple Choice

Suppose a Normal model describes the number of pages printer ink cartridges last. If we keep track of printed pages for the 47 printers at a company's office, which must be true?
I. The page counts for those ink cartridges will be normally distributed. II. The histogram for those page counts will be symmetric.
III. 95% of those page counts will be within 2 standard deviations of the mean.

• A) I, II, and III
• B) I only
• C) II only
• D) none
• E) II and III

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Definitions:

Naps

Short periods of sleep, typically taken during the day, that can help improve mood, alertness, and performance.

Insomnia

A sleep disorder characterized by difficulty falling asleep, staying asleep, or obtaining restorative sleep, leading to impaired daytime functioning.

Sleep Apnea

A disorder marked by repeated interruptions of breathing during sleep due to the blockage of the upper airways or improper brain signals.

Narcolepsy

A condition where an individual experiences overwhelming sleepiness during the day and unexpected sleep episodes.