Question

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Explanation:

Identify height unit

Using the Units of Measurement knowledge point

• Height measures physical length.
• Among the dropdown options ("degrees of Fahrenheit", "feet", "liters", "feet per second"), "feet" is the standard unit for measuring human height.

Identify frequency unit

Using the Units of Measurement knowledge point

• Frequency measures how often an event occurs over a period of time.
• The variable is "how frequently a person attends pop concerts".
• A logical unit for this frequency is "concerts per year".

Analyze correlation

Using the Correlation Analysis knowledge point

• The two variables are a person's height and how frequently they attend pop concerts.
• There is no physical, biological, or logical link suggesting that taller or shorter people attend pop concerts more or less often.
• Therefore, these two variables are not correlated.

Answer:

To measure height, the unit <blank>feet</blank> might be used.

To measure the frequency a person attends pop concerts, the unit <blank>concerts per year</blank> might be used.

What correlation, if any, is there between the variables?

• A. There is a negative correlation because the height of a person tends to increase when the frequency a person attends pop concerts decreases.
• B. There is a positive correlation because the height of a person tends to increase when the frequency a person attends pop concerts increases.
• C. The variables are not correlated. (Correct answer)