Julie Noticed That the Number of Hours She Sleeps Each

question 97

Multiple Choice

Julie noticed that the number of hours she sleeps each night is related to the scores she receives on quizzes the next day.As her sleep approaches 8 hours,her quiz scores improve;as her sleep drops to 5 hours,her quiz scores show a similar decline.Julie realizes that

• A)there is a negative correlation between the number of hours she sleeps and her quiz grades.
• B)there is a positive correlation between the number of hours she sleeps and her quiz grades.
• C)her low quiz scores are caused by sleep deprivation the night before a quiz.
• D)she should sleep about 10 hours a night to ensure 100 percent quiz grades.

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Definitions:

Wavelength

The distance between successive crests of a wave, often used to describe the physical properties of electromagnetic waves such as light and radio waves.

Purity

The state of being free from contaminants, adulterants, or imperfections; often used in moral or ethical contexts.

Amplitude

A measure of the intensity or strength of a wave signal, depicted as the height of the wave from its equilibrium.

Complexity

A characteristic of a system or model that has multiple components which interact in varied and intricate ways.