for question 3: how would having people not wear insoles at all cause a placebo effect, at least compared to having them wear the normal insoles?

The fact that the Treatment group has received something that the Control group hasn't might psychologically impact the Treatment group. The Treatment group might become more confident having received extra equipment. Compared to the Control group that didn't get to experience that little burst of excitement we all get from being introduced to something new.

>Problem 2: What is the primary purpose of randomly assigning the runners to use either the new or existing insoles? Roughly similar groups also reduce the confounding effect, right? Why should the answer not be B

Having 2 roughly similar groups doesn't guarantee that you might not have to deal with any confounding variables.

Main content

AP®︎/College Statistics

Course: AP®︎/College Statistics > Unit 6

Lesson 4: Introduction to experimental design

Principles of experiment design

AP.STATS:

VAR‑3 (EU)

VAR‑3.A.4 (EK)

VAR‑3.B (LO)

VAR‑3.B.1 (EK)

VAR‑3.C (LO)

VAR‑3.C.1 (EK)

VAR‑3.C.4 (EK)

CCSS.Math:

HSS.IC.B.3

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Elle
Posted 2 years ago. Direct link to Elle's post “for question 3: how would...”
for question 3: how would having people not wear insoles at all cause a placebo effect, at least compared to having them wear the normal insoles?
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- MrBentley.x
  Posted a year ago. Direct link to MrBentley.x's post “The fact that the Treatme...”
  The fact that the Treatment group has received something that the Control group hasn't might psychologically impact the Treatment group. The Treatment group might become more confident having received extra equipment. Compared to the Control group that didn't get to experience that little burst of excitement we all get from being introduced to something new.
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sgopalan58
Posted 3 years ago. Direct link to sgopalan58's post “>Problem 2: What is the p...”
>Problem 2: What is the primary purpose of randomly assigning the runners to use either the new or existing insoles?

Roughly similar groups also reduce the confounding effect, right? Why should the answer not be B
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- nik
  Posted a year ago. Direct link to nik's post “Having 2 roughly similar ...”
  Having 2 roughly similar groups doesn't guarantee that you might not have to deal with any confounding variables.
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Brian Pedregon
Posted 2 months ago. Direct link to Brian Pedregon's post “Pedtrol was here”
Pedtrol was here
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2405007
Posted 19 days ago. Direct link to 2405007's post “what is confounding?”
what is confounding?
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Asiwome Agbleze
Posted 4 years ago. Direct link to Asiwome Agbleze's post “Why should question 2 be ...”
Why should question 2 be A and not B?
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- Chennu Wang
  Posted 4 years ago. Direct link to Chennu Wang's post “There is no reason that t...”
  There is no reason that the experiment might limit replication. However, since the runners do not know which insoles they were given, it might create a placebo effect, where the runner thinks it will make running easier.
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Maecie Rogahn
Posted 5 months ago. Direct link to Maecie Rogahn's post “My question got answered”
My question got answered
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