Dr Zelke Surveys 50 University Students to Discover the Relationship

question 70

Multiple Choice

Dr. Zelke surveys 50 university students to discover the relationship between textbook price and ratings of readability. Dr. Zelke finds that for these two variables the correlation coefficient is -.70. This indicates that

• A)more expensive books tend to receive higher readability ratings than less expensive books.
• B)there is no relationship between textbook price and ratings of readability.
• C)increasing a textbook's price will cause a decrease in its readability rating.
• D)more expensive books tend to receive lower readability ratings than less expensive books.

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Definitions:

Relative Ratio

A term used to describe the proportional relationship between quantities or concentrations of substances.

Peak

A term often used in spectroscopy and chromatography to describe the highest point in a graph representing the presence or concentration of a substance.

Splitting

A phenomenon observed in NMR spectroscopy where a signal is divided into multiple smaller peaks due to interactions between nuclear spins, indicating the presence of nearby non-equivalent hydrogen atoms.

Signals

Forms of communication or data transmission, often representing information being transferred from one place to another.