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  A researcher would like to determine whether an over-the-counter cold medication has an effect on mental...

  A researcher would like to determine whether an over-the-counter cold medication has an effect on mental alertness.  A sample of n = 16 participants is obtained, and each person is given a standard dose of the medication one hour before being tested in a driving simulation task.  For the general population, reaction time scores on the simulation task are normally distributed with μ = 210 and σ = 20.  The individuals in the sample had an average score of M = 222.

            a. Can the research conclude that the medication has a significant effect on

mental alertness as measured by the driving simulation task?  Use a two-tailed test with α = .05.

  1. State the Independent and Dependent Variables
  2. State the Null Hypothesis in words and symbols.

b State the alternative Hypothesis in words and symbols.

  1. Compute the appropriate statistic.
  2. What is the decision (Retain or Reject)
  3. State the full conclusion in words

Effect

Direction

Size of Effect

Math   Statistics-And-Probability   
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