An Experimental Neuropsychologist Wishes to Determine Whether a New Drug

question 11

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 the trials main effect is

• A)1
• B)2
• C)3
• D)24
• E)29

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Economic Efficiency

A condition where resources are allocated in a way that maximizes the production of goods and services without wasting any resources.

Economic Efficiency

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Automobile Safety

Automobile Safety involves the design, equipment, and regulations that aim to minimize the occurrence and consequences of traffic accidents.

Additional Cost

Expenses that are not initially planned for but arise during the production or execution of a project, also known as incidental or unforeseen costs.