After Analyzing Her Data, Professor Nelson Discovers That a Correlation

question 8

Multiple Choice

After analyzing her data, Professor Nelson discovers that a correlation coefficient of +.75 exists between the amount of coffee a person drinks and the degree of stress experienced. Professor Nelson can safely conclude that:

• A) there is no relationship between stress and coffee consumption.
• B) stress causes people to drink coffee.
• C) as coffee consumption increases, stress also increases.
• D) drinking coffee produces stress.

---

Definitions:

Bar Chart

A graphical display used to represent data with rectangular bars of lengths proportional to the values that they represent.

Qualitative Variable

A variable that categorizes or describes an attribute using qualitative properties (e.g., colors, names, labels).

Stem And Leaf Plot

A graphical representation used in descriptive statistics to display quantitative data where each data point is split into a "stem" and a "leaf."

Limnologist

A scientist who specializes in the study of inland waters, including the biological, chemical, physical, and geological characteristics and processes of lakes and rivers.