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Re: For a university study on exercise habits, three equal groups were eac [#permalink]
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mimishyu wrote:
negate assumption( choice(A) (B) (C) (D) (E))
then to examine---->which choice will make conclusion be negate, that is—dance is “not” the activity that people are most likely to continue, the one fit this requirement will be assumption

negate as below:

(A)
“more participant” change from dance to another activity
……though it’s easy to pick this one by inituitive
……this is “sufficient” but not necessary one to reach the conclusion

also there’s another flaw to this statement as we see words in this choice “after the survey ended”, if this conclusion is made after the survey ended then no matter what happen it will be invalid

(B)
joggers and rowers are more likely than dancers to become injure
--dancer’s injury accident low
--dancers more likely continue(support the conclusion rather than weaken)

(C)
dance more dependent on favorable weather/influence by weather more
--dance not more likely to continue…. how come it support the conclusion???

(D)
I can’t quite grasp what this choice really want to convey at first sight, after more thorough thinking I found that maybe use the concept of vulgar fraction to solve will be better

(choose by theirselves) ---more subjective, numerator
---------------------------------------------
(random assign) ----more objective, denominator

this vulgar fraction, if negation method applied, is lower for Jogging &Rowing/ higher for Dancing group, or say in Dancing group there have less random assign participants and more participants choose by their interest, thus the result is biased also the conclusion will break as other people have mentioned before

(E) since the stimulus says this question concern about “three equal groups”, thus the number of participants within each group won’t be different



Responding to a pm:

Again, focus on the important things:

Equal grps were made to start rowing, jogging and dancing.
After 3 months, 80% of dancing grp was continuing while only 50% of rowing and jogging grps were continuing.

Conclusion: Once started, people are more likely to continue dancing.
(We don't care why! That is not a part of our argument. We are establishing that people are more likely to continue dancing. What will strengthen it with something that tells us, yes they are more likely to continue dancing. The data was accurate. What will weaken it is something that tells us no, they are not more likely to continue dancing. The data was not accurate.)

Our conclusion is based on a study. The study establishes that people are more likely to continue dancing. We need an assumption for the conclusion. The assumption will be that the study is genuine. That we can depend on the study's results etc.

Can the following be assumptions?
- Dance uses music which people find mood-boosting while other activities don't.
- Dance does not need any specific attire while other activities do.
- Dance is less dependent on weather than other activities.

No. These could be reasons why people continue dancing but we don't need to ASSUME any of these to establish that people DO continue dancing. There could be a million reasons WHY people continue dancing and none of the above NEEDS to be NECESSARILY true.
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Re: For a university study on exercise habits, three equal groups were eac [#permalink]
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Re: For a university study on exercise habits, three equal groups were eac [#permalink]
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