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Author Question: A researcher wants to test the hypothesis that alcohol reduces driver's reaction time. On a closed ... (Read 389 times)

Themember4

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on: Jun 15, 2020
A researcher wants to test the hypothesis that alcohol reduces driver's reaction time. On a closed driving course, the researcher studies 50 drivers with alcohol in their system and 50 drivers with no alcohol in their system, while measuring reaction time in milliseconds. The average reaction time for drivers with alcohol in their system was 142 milliseconds with a standard deviation of 7.45. The average reaction time with no alcohol in their system was 134 milliseconds with a standard deviation of 6.81.

What is the research hypothesis?
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Marked as best answer by Themember4 on Jun 15, 2020

zhanghao

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Reply #1 on: Jun 15, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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SGallaher96

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Reply #2 on: Jun 15, 2020
A researcher wants to test the hypothesis that alcohol reduces driver's reaction time. On a closed driving course, the researcher studies 50 drivers with alcohol in their system and 50 drivers with no alcohol in their system, while measuring reaction time in milliseconds. The average reaction time for drivers with alcohol in their system was 142 milliseconds with a standard deviation of 7.45. The average reaction time with no alcohol in their system was 134 milliseconds with a standard deviation of 6.81.

What is the null hypothesis? (pay attention to the scenario)


katheyjon

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Reply #3 on: Jun 15, 2020
Having alcohol in their system will not cause drivers to have a slower reaction time
than those with no alcohol in their system. Or µ drivers with alcohol in their system
? µ drivers with no alcohol in their system


ETearle

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Reply #4 on: Jun 15, 2020
A researcher wants to test the hypothesis that alcohol reduces driver's reaction time. On a closed driving course, the researcher studies 50 drivers with alcohol in their system and 50 drivers with no alcohol in their system, while measuring reaction time in milliseconds. The average reaction time for drivers with alcohol in
their system was 142 milliseconds with a standard deviation of 7.45. The average reaction time with no alcohol in their system was 134 milliseconds with a standard deviation of 6.81.

Calculate t


akpaschal

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Reply #5 on: Jun 15, 2020
t = 5.548


roselinechinyere27m

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Reply #6 on: Jun 15, 2020
A researcher wants to test the hypothesis that alcohol reduces driver's reaction time. On a closed driving course, the researcher studies 50 drivers with alcohol in their system and 50 drivers with no alcohol in their system, while measuring reaction time in milliseconds. The average reaction time for drivers with alcohol in
their system was 142 milliseconds with a standard deviation of 7.45. The average reaction time with no alcohol in their system was 134 milliseconds with a standard deviation of 6.81.

What are your degrees of freedom?


Jadwiga9

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Reply #7 on: Jun 15, 2020


faduma

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Reply #8 on: Jun 15, 2020
A researcher wants to test the hypothesis that alcohol reduces driver's reaction
time.  On a closed driving course, the researcher studies 50 drivers with alcohol in
their system and 50 drivers with no alcohol in their system, while measuring
reaction time in milliseconds.  The average reaction time for drivers with alcohol in
their system was 142 milliseconds with a standard deviation of 7.45. The average
reaction time with no alcohol in their system was 134 milliseconds with a standard
deviation of 6.81.

Are your results significant, and if so, at what level?


shewald78

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Reply #9 on: Jun 15, 2020
Yes, at the .0005 level. (5.548 > 3.460, the intersection of 60 df and .0005 in Table
C)


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