A researcher believes that a common over-the-counter medication for arthritis, A

Question

A researcher believes that a common over-the-counter medication for arthritis, Advil, will have a negative effect on driving ability when administered in high doses. You ask a group of seven adults who have arthritis and use Advil to participate in a driver simulation task while under the influence of a high amount of Advil. You record the following braking times (in seconds) required to stop upon seeing a car stopped ini the same lane in front of them. You expect the Advil drivers to have significantly retarted or slower (hence longer braking times, or increased braking times) braking times than the normative group. The mean braking time on this task for the population of persons with arthritis who have not self-administered Advil or other drugs is mu =0.7 seconds. Remember, higher braking time scores mean that the individual is "slow", and the researcher expects Advil will slow braking times. Braking times (in seconds) 1.2 1.0 1.1 1.4 0.9 1.0 1.6 Which hypothesis test needs to be employed here, the z test or the one-sample t test? z test one-sample t test

Explanation / Answer

Null and Alternate hypothesis respectively are:

H0: Advil will have slow braking times.

H1: Advil will not have slow braking time.

We know that whenever we are dealing with a small sample (n<30) and when population variance is unknown, we use one-sample t-test for testing the hyposthesis.

Since in this case the sample size is 7, so we use one-sample t-test.

Hence 2nd option is correct.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.