You Wish to Construct a 90% Confidence Interval to Compare

question 41

Multiple Choice

You wish to construct a 90% confidence interval to compare the mean measurement for two groups.A small pilot study yields sample standard deviations of 20 and 30 for Group 1 and Group 2,respectively.If we wish to obtain a margin of error of at most 5,what sample size should we take from each group? Assume equal sample sizes.

• A)141
• B)139
• C)143
• D)140
• E)142

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Definitions:

Spontaneous Recovery

The process in classical conditioning by which a conditioned response can recur after a time delay, without further conditioning.

Emotional Amnesia

A condition in which an individual is unable to recall emotional memories, often due to psychological trauma.

Discriminatory Learning

The process by which organisms learn to respond differently to different stimuli based on their experiences.

Contingency Learning

The process of learning to associate a particular action or behavior with a specific consequence or reward.