A Researcher Conditions Rats to Fear a Tone That Was

question 48

Multiple Choice

A researcher conditions rats to fear a tone that was sounded just prior to a brief shock.To measure fear following this conditioning,she records the number of lever presses by each rat in the presence and in the absence of the tone.It was hypothesized that reduced lever pressing in the presence of the tone was evidence for a conditioned fear response in rats.If the researcher tested this hypothesis at a .05 level of significance (two-tailed test) ,then what is her decision if she computes t = ñ2.842 in a sample of 8 rats.

• A)Retain the null hypothesis;there is evidence for a conditioned fear response.
• B)Retain the null hypothesis;there is not evidence for a conditioned fear response.
• C)Reject the null hypothesis;there is evidence for a conditioned fear response.
• D)Reject the null hypothesis;there is not evidence for a conditioned fear response.

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Definitions:

Useful Life

The estimated time period that an asset is expected to be usable for the purpose it was acquired.

Maintenance

The act of keeping an asset in good condition through regular check-ups and repairs to ensure its proper function and prolong its life.

Straight-Line Method

A method of calculating the depreciation of an asset, which allocates an equal amount of depreciation each year over its useful life.