An Experimental Neuropsychologist Wishes to Determine Whether a New Drug

question 6

Multiple Choice

An experimental neuropsychologist wishes to determine whether a new drug (X-9) enhances the growth of new, functional brain tissue after maximal brain growth has already been attained after a period of 1 month and 6 months. Five rats were run in a series of three different mazes. All of the mazes were judged to be of equal difficulty. The time in seconds to solve each maze is recorded for each rat across its three mazes. X-9 was given 2 weeks before testing. A prior study statistically demonstrated that rats not given X-9 did not improve their times. Is there any evidence X-9 works? $\begin{array} { l c c c c c c } \hline & { \text { 1 Month } } & & & \text { 6 Months } \\\hline & \text { Trial 1 } & \text { Trial 2 } & \text { Trial 3 } & \text { Trial 1 } & \text { Trial 2 } & \text { Trial 3 } \\\hline \text { Rat 1 } & 10 & 12 & 5 & 4 & 5 & 4 \\\text { Rat 2 } & 15 & 14 & 8 & 6 & 5 & 4 \\\text { Rat 3 } & 14 & 14 & 7 & 6 & 7 & 7 \\\text { Rat 4 } & 9 & 10 & 5 & 7 & 8 & 8 \\\text { Rat 5 } & 12 & 11 & 4 & 7 & 6 & 7 \\\hline\end{array}$
-The df for SST is

• A)1
• B)2
• C)3
• D)24
• E)29

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Definitions:

Values

Principles or standards of behavior; one's judgment of what is important in life or in a specific situation.

Pure Substances

Materials that are made of only one type of atom or molecule.

Impure Mixtures

Combinations of two or more substances that are not chemically bonded together and can be separated by physical means.

Compute

To carry out mathematical or logical operations on data in order to obtain a result, often associated with the use of computers or calculators for complex calculations.