Understanding Experiments with Two Groups - Answer Key
Twenty Sets $1 =$

question 119

Essay

Understanding Experiments with Two Groups - Answer Key
Twenty sets of depressed twins are obtained for a study on the effects of a new antidepressant. In each twin set, one twin is assigned to receive the drug, and the other is designed to receive the placebo. Three months later, depression levels are measured on a scale from 1 (not at all depressed) to 7 (very depressed). The following data was obtained:
GROUP $1 =$ Received drug
GROUP $2 =$ Received placebo
Variable $=$ Depression level
$\begin{array} { l l l l } \text { GROUP } & N & \text { Mean } & S D \\ \text { GROUP 1 } & 10 & 3.21 & 1.035 \\ \text { GROUP 2 } & 10 & 5.77 & 1.772 \\ t = 5.785 & d f = 9 & p = 0.017 & \text { Cohen's } d = .88 \end{array}$
-Is the effect size small, medium, or large? How do you know?

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Definitions:

Ring Networks

A network topology where each node is connected to exactly two other nodes, forming a single continuous pathway for signals through each node - a ring.

Data Collisions

Occurrences in network communications where two devices attempt to send information over a network channel at the same time, resulting in a loss of data.

Device

A piece of equipment or hardware designed to perform specific tasks or functions, often electronic in nature.

Network Adapter

A network adapter is hardware within a computer that enables it to communicate over a network, either wired or wirelessly.