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QOTD # 1 That sales can be increased by the presence of sunl

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QOTD # 1 That sales can be increased by the presence of sunl [#permalink] New post 15 Sep 2016, 05:37
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66% (01:31) correct 33% (04:03) wrong based on 30 sessions
That sales can be increased by the presence of sunlight within a store has been shown by the experience of the only Savefast department store with a large skylight. The sky-light allows sunlight into half of the store, reducing the need for artificial light. The rest of the store uses only artificial light. Since the store opened two years ago, the depart-ments on the sunlit side have had substantially higher sales than the other departments.

Which of the following, if true, most strengthens the argument?

A) On particularly cloudy days, more artificial light is used to illuminate the part of the store under the skylight.
B) When the store is open at night, the departments in the part of the store under the skylight have sales that are no higher than those of other departments.
C) Many customers purchase items from departments in both parts of the store on a single shopping trip.
D) Besides the skylight, there are several significant architectural differences between the two parts of the store.
E) The departments in the part of the store under the skylight are the departments that generally have the highest sales in other stores in the Save fast chain.

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Re: QOTD # 1 That sales can be increased by the presence of sunl [#permalink] New post 15 Sep 2016, 05:38
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Explanation

The passage compares sales of items in the sunlit part of the store with sales of items in the artificially lit part of the store and concludes that since the former are greater than the latter, the presence of sunlight increases sales. The assumption underlying this argument is that the only significant difference between the two parts of the store is the presence of sunlight—otherwise, the inherent popularity of goods sold in different locations, or some other factor, might account for the increased sales. Choice B helps rule out the possibility that other factors might be involved, by showing that sales are no greater when the sunlight is taken out of the equation. Therefore it is the correct answer. Choices D and E both suggest that factors besides sunlight might explain the discrepancy between sales; therefore they weaken rather than strengthen the argument, and so are incorrect. Neither Choice A nor Choice C point to differences between the two areas of the store; therefore they are both incorrect as well.
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Re: QOTD # 1 That sales can be increased by the presence of sunl [#permalink] New post 28 Feb 2018, 05:55
i took 2:23 min is it more ?
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Re: QOTD # 1 That sales can be increased by the presence of sunl [#permalink] New post 28 Feb 2018, 07:44
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On average NO. It depends on the difficulty of the question.
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Re: QOTD # 1 That sales can be increased by the presence of sunl [#permalink] New post 10 Aug 2018, 09:51
A) It does not help for strengthening
B) When the store is open at night, the departments in the part of the store under the skylight have sales that are no higher than those of other departments: that is, if sunlight does not affect, there is a difference in sales. This means, that sunlight affects.
C) irrelevant information
D) This actually undermines
E) This actually undermines
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Re: QOTD # 1 That sales can be increased by the presence of sunl [#permalink] New post 01 Jan 2019, 14:23
B - classic answer choice - No cause -> no effect.
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Re: QOTD # 1 That sales can be increased by the presence of sunl [#permalink] New post 02 Jan 2019, 11:36
manishcmu wrote:
B - classic answer choice - No cause -> no effect.


This is correct and very succinct! For anyone who is not quite as versed in critical reasoning here is a little more on the topic of cause and effect.

When you find that a critical reasoning question concludes that one thing is the cause of another then you have a cause and effect relationship. In this case the supposed cause is the presence of sunlight and the observed effect is increased sales.

The effect is always true and cannot be debated. In this question it is true that the departments under the skylight do in fact have higher sales. What is is doubt is the reason why the sales are higher. You can imagine many other reasons besides the sunlight. It could be that the items in that section are more popular or more expensive or that these are necessities that everyone needs to purchase. Perhaps the section under the skylight has recently been renovated and so it is a more pleasant place to be regardless of the sunlight. So there are lots of other potential causes.

If you wanted to weaken the argument you could simply mention one of these other causes. This would cast some doubt. This is called offering an "alternate cause." This is a frequent way to weaken cause and effect.

To weaken you could also show the same effect occurring without the cause. For example, the same departments could have higher sales in other Savefast stores even though these other stores do not have skylights. This would show that the effect occurs without the cause and would weaken. Similarly you could show that the cause occurs without the effect. So if 10 other stores with skylights showed no differences in sales that would also weaken.

Of course in this case we are looking to strengthen. And to strengthen we can do the opposite of the things that would weaken. So instead of mentioning an alternate cause we could have an answer choice that blocked an alternate cause. It could say something like - the departments under the skylight are not more popular than the other departments. Thereby blocking one alternate cause.

We could also show that the cause leads to the effect in other situations. Such as showing that in other department stores with skylights the departments receiving natural light have higher sales.

And finally we can do what is done in this case. As manishcmu mentions this answer choice B is a case of "no cause therefore no effect." What this means is when the cause is taken away - obviously there is no sunlight coming through the skylights at night - the effect goes away as well - sales are not higher in those departments at night.

In summary, for cause and effect questions:

To weaken:

1) Show Alt Cause
2) Show the Cause without the effect
3) Show the effect without the cause


To Strengthen:

1) Block an alternate cause
2) Show that the cause leads to the effect in other situation(s)
3) Show that without the cause the effect goes away as well.
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Re: QOTD # 1 That sales can be increased by the presence of sunl   [#permalink] 02 Jan 2019, 11:36
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