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 persons with arthritis who have not self-administered Advil or other drugs is = 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 of the following are the correct statements of the null and alternate hypotheses, H0 and HA ?

a. H0: µ = .7 and HA: µ .7

b. H0: µ .7 and HA: µ = .7

c. H0: µ > .7 and HA: µ .7

d. H0: µ .7 and HA: µ < .7

e. H0: µ < .7 and HA: µ .7

f. H0: µ .7 and HA: µ > .7

Explanation / Answer

Since  we expect the Advil drivers to havelonger braking times, or increased braking times than the normative group.

H0 is that mean = 0.7 while HA is that mean > 0.7

Hence, the anser is

f. H0: µ =0.7 and HA: µ > 0.7

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