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:

Keynes

Keynes refers to John Maynard Keynes, a British economist whose theories on government spending and monetary policy revolutionized economic thinking and policy in the 20th century.

Government Intervention

Actions taken by a government to influence or directly regulate various activities within its economic systems.

Taxes

Required financial dues or other levy types enforced on taxpayers by governmental institutions, intended to support government funding and multiple public spending purposes.

Average Price Level

An index that summarizes prices across a variety of goods and services within an economy at a given time, providing a snapshot of overall price trends.