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

Complete step 3 of the hypothesis testing procedure and calculate z or t, whichever is appropriate for these data. Round to the nearest hundredths place. If your calculated z or t is not identical to one of the values below, but within plus or minus 0.2 of an answer below, assume it's a rounding error and select the answer that is closest to your calculated value. Ignore the minus sign if your calculated z or t is negative.

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

Explanation / Answer

Here, mean = 0.7 , x = 1.17 , s = 0.249 , n = 7

By normal distribution formula,

t = ( x - mean) / ( s /sqrt(n))

= ( 1.17 - 0.7 ) /( 0.249 / sqrt(7))

= 4.99

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

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