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Need help with this IR question from GMAT prep software

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Need help with this IR question from GMAT prep software

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GMAT Prep

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Newbie | Next Rank: 10 Posts Default Avatar
Joined
06 Dec 2018
Posted:
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Those people are read this post definitely they will loved every little bit of it. Deck & Fence Staining Nolensville, Tennessee

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Junior | Next Rank: 30 Posts Default Avatar
Joined
29 Jan 2019
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Isn't it TTF? The number of unlimited lanes sure looks like it has a negative correlation with the average customer age. The three stores with the oldest customers don't have any and the more unlimited lanes you have, the younger the average customer.

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Newbie | Next Rank: 10 Posts Default Avatar
Joined
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Test Date:
24 April 2019
Target GMAT Score:
770
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It is TFF. If you re-arrange the order of Self-Check Unlimited Lanes by Customer Age from youngest to oldest, you get the following:

CA - SCUL
28.40 - 6
29.90 - 8
32.00 - 4
34.50 - 4
34.60 - 6
38.73 - 3.56
38.80 - 0
42.50 - 4
50.50 - 0
56.70 - 0

As you see, there is an up-down-up-down-up-down pattern. If you eliminated the ages 29.90, 34.60, and 42.50 then there would be a negative correlation.

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