A Study Is Conducted to Determine the Effect of Different

question 35

Multiple Choice

A study is conducted to determine the effect of different doses of a cold medication on reaction times. In a study of 20 participants between 20 and 25 years of age, half were given a single dose of medication and the other half were given two doses. Thirty minutes after dosing, a simple mechanical experiment measured subject reaction time in milliseconds. The results are summarized below. Calculate the 95% confidence interval for the difference in reaction times for these two groups. Assume that the reaction times are normally-distributed and that the treatments were randomly assigned.

• A)(-351, 12)
• B)(-326, -14)
• C)(-385, 46)
• D)(-201, -28)

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Definitions:

Z-Drag Extractions

A mechanical advantage system used in technical rope rescue and water rescue to move heavy loads or trapped individuals.

Peel-Outs

Rapid acceleration in a vehicle causing the tires to spin and produce smoke, often leaving marks on the road surface.

Ferries

Boats or ships designed to carry passengers, vehicles, or cargo across a body of water, often as part of a regular, scheduled service.

Screening Techniques

Refers to methods used to identify or select specific characteristics or individuals from a larger population based on defined criteria.