A researcher would like to determine whether an over-the-counter cold medication

Question

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 = 210 and = 20. The individuals in the sample had an average score of M = 222.

Which of the following best represents the null research hypothesis?

Those taking cough medicine are more mentally alert than the general population

There is a difference in mental alertness between those taking cold medicine and the general population.

Those taking cough medicine are less mentally alert than the general population.

There is no difference in mental alertness between those taking cold medicine and the general population.

Those taking cough medicine are more mentally alert than the general population

There is a difference in mental alertness between those taking cold medicine and the general population.

Those taking cough medicine are less mentally alert than the general population.

There is no difference in mental alertness between those taking cold medicine and the general population.

Explanation / Answer

Correct Answer: Option (D) There is no difference in mental alertness between those taking cold medicine and the general population.

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