A Researcher Wants to Conduct a Before/after Study on 11

question 94

Multiple Choice

A researcher wants to conduct a before/after study on 11 subjects to determine if a new cholesterol medication results in higher HDL cholesterol readings.The null hypothesis is that the average difference is zero while the alternative hypothesis is that the average difference is not zero.Scores are obtained on the subjects both before and after taking the medication.After subtracting the after scores from the before scores, the average difference is computed to be -2.40 with a sample standard deviation of 1.21.A 0.05 level of significance is selected.Assume that the differences are normally distributed in the population.The table t value for this test is _______.

• A)1.812
• B)2.228
• C)2.086
• D)2.262
• E)3.2467

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Definitions:

Arousal Theory

Theory of motivation in which people are said to have an optimal (best or ideal) level of tension that they seek to maintain by increasing or decreasing stimulation.

Optimal

The most favorable condition or level for growth, effectiveness, or well-being.

Large-Scale Events

Events characterized by their large geographic scope, significant number of participants, or substantial impacts on societies and economies.

Catastrophes

Large-scale disasters or tragic events that cause significant harm or damage, often with widespread and long-lasting effects.