A Friend of Yours Was Asked to Evaluate the Effect

question 2

Multiple Choice

A friend of yours was asked to evaluate the effect of an advertisement campaign designed to get people to have their blood pressure checked.After examining the records kept by the blood pressure units in the target area,your friend showed you the following graph where X indicates an observation.

What will you tell your friend?

• A)The ad campaign is producing the intended effect.
• B)The independent variable, the campaign, is having an effect on the dependent variable, the percent having their blood pressure checked.
• C)More observations are needed to determine whether the independent variable is having the intended effect.
• D)The ad campaign has no effect.
• E)There is no relation between the two variables.

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Definitions:

Supply Curve

A graphical representation that shows the relationship between the price of a good or service and the quantity of that good or service that a supplier is willing and able to supply at those prices.

Graph

A visual representation of data or mathematical functions using a system of coordinates or other symbols.

Line

In geometry, a line is an infinitely thin, infinitely long collection of points extending in two opposite directions.

Retrospective Study

A research method that examines historical data from past records to study outcomes or disease progression.