Any new forum for Integrated reasoning questions?

[krishnan.anju1987]

Hi,

I saw a few questions in this new topic that I needed clarifications in. Is there some forum where this can be discussed as I dont want to spam other forums with my queries..

[krishnan.anju1987]

This is one of those questions

Email from administrator to research staff


January 15, 10:46 a.m.


Yesterday was the deadline for our receipt of completed surveys from doctors who were invited to participate in the Medical Practice Priorities Survey. Did we get enough returns from this original group of invitees to get reliable statistics? Do we need to invite additional participants?


Email from project coordinator in response to the administrator’s January 15, 10:46 a.m. message


January 15, 11:12 a.m.


Altogether we got exactly 350 actual survey completions. We need at least 700 and were hoping for even more, so we plan to invite a second group to participate. Both the results from this first group and other research indicates that with this type of survey and this type of participants there is about a 40 percent probability that any given invitee will submit the completed survey in the time we’ll allow. (Obviously that doesn’t mean that if we invited 1,000 we’d necessarily get at least 400, so we need to think in terms of the risks of getting too few returns or exceeding the budget.) All of the participants who submitted their surveys by the deadline will get the $50 payment we promised. What is our total budget for compensation to participants?


Email from administrator to project coordinator in response to the project coordinator’s January 15, 11:12 a.m. message


January 15, 1:54 p.m.


The budget we allocated for compensation to those who complete and submit the Medical Practice Priorities Survey is $45,000. We will honor our commitment to pay $50 to each participant"”in the second group as well as the first"”who completes the survey and submits it by the deadline we specify when we invite them to participate. However, we will need to try not to exceed the total amount that is budgeted for this purpose.


Consider each of the following statements. Does the information in the three emails support the inference as stated? If so click on yes otherwise no.

- The project coordinator does not expect to be able to meet the goal for numbers of completed surveys received.

For this one I thought since the project coordinator mentioned "1,000 we’d necessarily get at least 400, so we need to think in terms of the risks of getting too few returns or exceeding the budget" in his mail, he was not sure whether they would e able to meet the girl. The OA is yes.

By the way, these questions are from the GMAT Prep.

[krishnan.anju1987]

Another one.

Tehniques

Island Museum analyzes historical artifacts using one or more techniques described below"”all but one of which is performed by an outside laboratory"”to obtain specific information about an object’s creation. For each type of material listed, the museum uses only the technique described:


Animal teeth or bones: The museum performs isotope ratio mass spectrometry (IRMS) in-house to determine the ratios of chemical elements present, yielding clues as to the animal’s diet and the minerals in its water supply.


Metallic ores or alloys: Inductively coupled plasma mass spectrometry (ICP-MS) is used to determine the ratios of traces of metallic isotopes present, which differ according to where the sample was obtained.


Plant matter: While they are living, plants absorb carbon-14, which decays at a predictable rate after death; thus radiocarbon dating is used to estimate a plant’s date of death.


Fired-clay objects: Thermoluminescence (TL) dating is used to provide an estimate of the time since clay was fired to create the object.

Artifacts

Island Museum has acquired a collection of metal, fired clay, stone, bone, and wooden artifacts found on the Kaxna Islands, and presumed to be from the Kaxna Kingdom of 1250-850 BC. Researchers have mapped all the mines, quarries, and sources of clay on Kaxna and know that wooden artifacts of that time were generally created within 2 years after tree harvest. There is, however, considerable uncertainty as to whether these artifacts were actually created on Kaxna.


In analyzing these artifacts, the museum assumes that radiocarbon dating is accurate to approximately ±200 years and TL dating is accurate to approximately ±100 years.

BUDGET

For outside laboratory tests, the museum’s first-year budget for the Kaxna collection allows unlimited IRMS testing, and a total of $7,000"”equal to the cost of 4 TL tests plus 15 radiocarbon tests, or the cost of 40 ICP-MS tests"”for all other tests. For each technique applied by an outside lab, the museum is charged a fixed price per artifact.


For each of the following combinations of Kaxna artifacts, select Yes if, based on the information provided, the cost of all pertinent techniques described can be shown to be within the museum’s first-year Kaxna budget. Otherwise, select No.

Yes
No

7 wooden statues and 20 metal implements

I thought the answer was no, but it is yes.

[krishnan.anju1987]

Another dout I had

Over a period of 5 academic years from Fall 1999 through Spring 2004, the number of faculty at a certain college increased despite a decrease in student enrollment from 5,500 students in Fall 1999.

In the given expressions, F and S represent the percent change in the number of faculty and students, respectively, over the 5 academic years, and R represents the number of students per faculty member in Fall 1999. The percent change in a quantity X is calculated using the formula (100) .

Select the expression that represents the number of faculty in Fall 1999, and select the expression that represents the number of students per faculty member in Spring 2004. Make only two selections, one in each column.

Question- What is the number of students in 2004. I got the answer as 5545/R

options are
5,500 R

A) 5500R
B)5500/R
C)1/R
D)(100+S)/(100+F)R
E)(100-S)/(100+F)R
F)(100+F)/(100-S)R

[StaceyKoprince]

oh, you're right, we need IR folders now! I'll ask tech to set those up.

Note that the same rules will apply: post in the appropriate folder, cite the source, etc.

We'll have one folder for MGMAT IR questions (CAT or book) and one folder for GMATPrep IR questions. Note that we still will not be able to post *paid* official questions (eg, from OG13 or GMATPrep Pack 1).

I'm not sure how long it'll take tech to get that up and running - next week sometime, probably. Just keep checking back!

[krishnan.anju1987]

Cool. Thanks for the info.

[StaceyKoprince]

you're welcome! in the meantime, go take a look through our blog. We've posted a lot of IR articles in the last 6 months or so, and a number of them work through a specific problem.

In fact, the research survey one - I just wrote an article about that one. If it's not posted yet, it should be posted soon!