Researcher: We conducted an experiment where we asked people to each b

Question

Researcher: We conducted an experiment where we asked people to each build the same simple model. We enlisted 200 volunteers and randomly divided them into 4 groups (Groups 1–4) of 50 members each. Each volunteer was assigned to exactly one of the groups. Each member of Group 1 was given as much time as that member needed to build the model. Each member of Group 2 was given a limited amount of time in which to build the model. Each member of Group 3 was asked to build the model while wearing a blindfold, and was given as much time as needed. Each member of Group 4 was asked to build the model while wearing a blindfold, and was given a limited amount of time. The researchers found that 98% of Group 1, 46% of Group 2, 90% of Group 3, and 20% of Group 4 were able to successfully build the model.

Select from each drop-down menu the option that creates the most accurate statement based on the information provided.

Based on these results, the researchers concluded that the______ 1 _______had a significant effect on performance and that the______ 2 _______had a smaller effect on performance.

Apt0810 · Answer

1)B,since if see the four groups success %

a)Group A -No blindfold, sufficient time-98%
b)Group B -No blindfold, limited time-46%
c)Group C - blindfold, sufficient time-90%
d)Group D - blindfold, limited time-20%

So here we see that the major transition in the success % is from the sufficient time to limited time,while the change from no blindfold to blindfold is only 8% ,while the time shows a greater % change, hence becomimg the key player here.

2)Presence of blindfold had a significant change as seen from the above answer's analysis

Posted from my mobile device

Catman · Answer

The four groups success %

a)Group 1 -No blindfold, sufficient time-98%
b)Group 2 -No blindfold, limited time-46%
c)Group 3 - blindfold, sufficient time-90%
d)Group 4 - blindfold, limited time-20%

From the above analysis, it is clear that when given unlimited amount of time(sufficient time/no time constraints) the success percentages are in the higher range of 90% for Group 3 and 98 % for Group 1 respectively. Thus it is a significant factor.

For blindfold the success ratio for Group 2 and Group 4 are 46% and 20% respectively, thus no major effect due to this, Hence not a significant factor.
 Answer will be B, A.

Note that the other factors mentioned in the question like group size are out of the scope.

Stoic25 · Answer

When we talk about significant effect, are we referring to a positive significant effect or a a negative significant effect?

cheshire · Answer

There is no positive significant effect? All the added conditions only reduce the amount of people who completed the puzzle.

WhitEngagePrep · Answer

When the phrase "significant effect" is used, you cannot know without more information whether the effect is positive or negative. However, that doesn't matter for this problem as there is only one effect discussed in the passage!

Whit

1	2
		presence of the blindfold
		presence of the time limit
		number of groups used in the study
		type of model each group was asked to build
		number of people assigned to a particular group

Researcher: We conducted an experiment where we asked people to each b

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

GMAT Two-part Analysis (TPA) Questions

Researcher: We conducted an experiment where we asked people to each b

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards