A Friend of Yours Was Asked to Evaluate the Effect

Multiple Choice

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

A) The ad campaign is producing the intended effect.
B) The independent variable, the campaign, is affecting 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) The independent variable, the campaign, is not affecting the dependent variable, the percent having their blood pressure checked.