Data Set 10-2: the IQs of a Group of Special $$\begin{array} { c c } \text { Special Ed } & \text { Not Special Ed } \\\hline 70 & 104 \\65 & 99 \\67 & 95\end{array}$$

Multiple Choice

Data Set 10-2: The IQs of a group of special education students were compared to the IQs of their siblings who were not in special education. The following data were obtained.
$$\begin{array} { c c } \text { Special Ed } & \text { Not Special Ed } \\\hline 70 & 104 \\65 & 99 \\67 & 95\end{array}$$
-The study described in Data Set 10-2 is an example of

A) an independent samples design
B) a paired-samples design
C) comparing a sample mean to a known population mean
D) unknown more information is required in order to decide, namely