If We Discover That There Is a Perfect Positive Correlation

question 129

Multiple Choice

If we discover that there is a perfect positive correlation r = +1.0 between the percent of brain damage a person suffered and the number of errors he makes on a test of memory,what conclusion can we draw?

• A)An increase in the percentage of brain damage causes one to make more errors on tests of memory.
• B)People suffering from brain damage shouldn't be given tests of memory.
• C)An increase in the percentage of brain damage is not a predictive factor in tests of memory.
• D)Increases in the percentage of brain damage are strongly associated with increases in the number of errors made on tests of memory.

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Definitions:

High-low Pricing

A retail strategy where items are initially offered at high prices but later discounted to stimulate sales.

Demand

The quantity of a product or service that consumers are willing and able to purchase at various prices during a specified period of time.

Range of Sale Price

The difference between the highest and lowest selling price of a product in a marketplace over a defined period.

Gasoline Purchases

Transactions involving the buying of gasoline, typically for vehicles, reflecting consumer demand and market prices.