Search found 21 matches
Two Standard Deviation (SD) rules:
1 SD. below mean =Mean-1*SD
2 SD. Below mean=Mean-2*SD.
Solution to the problem:
Given,
Mean =21; and SD=6
1 SD. Below mean =21-1*6=15
2 SD below mean =21-2*6=9
The value between 15 and 9 is 12.
[spoiler]Answer: 12[/spoiler]
- by catseye
Thu Aug 18, 2011 1:20 pm- Forum: Problem Solving
- Topic: Standard deviation
- Replies: 1
- Views: 831
probability!
There are 8 boys and 8 girls. If two groups are made from these boys and girls, what is the probability that one group will be only with girls?
Ans: After discussion
- by catseye
Mon Jul 25, 2011 7:38 am- Forum: Problem Solving
- Topic: probability!
- Replies: 2
- Views: 1036
Hi Friends, I am having difficulty with the following problem. Pleas help. Officials at the United States Mint believe that the Sacagawea dollar coin will be used more as a substitute for four quarters rather than for the dollar bill because its weight, only 8.1 grams, is far less than four quarter...
- by catseye
Tue Jul 12, 2011 10:22 am- Forum: Sentence Correction
- Topic: United States Mint
- Replies: 4
- Views: 1541
An sc doubt.
Though the term "graphic design" may suggest laying out corporate brochures and annual reports, they have come to signify widely ranging work, from package designs and company logotypes to signs, book jackets, computer graphics, and film titles. (A)suggest laying out corporate brochures an...
- by catseye
Wed May 04, 2011 10:27 am- Forum: Sentence Correction
- Topic: An sc doubt.
- Replies: 4
- Views: 1764
While at same time + Verb-ING is found in GMATPREP. I have also searched some other online newspapers such as nytimes, washingtonpost, and sciencedaily. I have found that while at the same time + verb-ing is an acceptable form. While at the same time + VERBING is most often used in GMAT. I have see...
- by catseye
Mon May 02, 2011 2:57 pm- Forum: Sentence Correction
- Topic: GMATPrep -- Parallelism+modifier+meaning
- Replies: 6
- Views: 1922
The proliferation of so-called cybersquatters, people who register the Internet domain names of high-profile companies in hopes of reselling the rights to those names for a profit, led to passing the Anti-Cybersquatting Consumer Protection Act in 1999, allowing companies to seek up to $100,000 in d...
- by catseye
Sat Apr 30, 2011 12:04 pm- Forum: Sentence Correction
- Topic: GMATPrep - Ing modifier in the role of an adverb
- Replies: 12
- Views: 3046
In laboratory rats, a low dose of aspirin usually suffices to block production of thromboxane, which is a substance that promotes blood clotting, but not seriously interfering with the production of prostacyclin, which prevents clotting. (A) which is a substance that promotes blood clotting, but not...
- by catseye
Sat Apr 30, 2011 11:48 am- Forum: Sentence Correction
- Topic: Gmat prep Sc - 4
- Replies: 10
- Views: 2868
Can anyone help me out with this one? The people of the ancient Assyrian Empire were renowned warriors, although they also crafted some of the best-preserved ancient art. A) were renowned warriors, although they also crafted B) had been renowned warriors, although they also crafted C) were renowned...
- by catseye
Sat Apr 30, 2011 11:32 am- Forum: Sentence Correction
- Topic: Comma Splice
- Replies: 23
- Views: 6398
In 1791 Robert Carter III, one of the wealthiest plantation owners in Virginia, stunned his family, friends, and neighbors by filing a deed of emancipation, setting free the more than 500 slaves who were legally considered his property. (A) setting free the more than 500 slaves who were legally con...
- by catseye
Fri Apr 29, 2011 9:24 am- Forum: Sentence Correction
- Topic: Intresting question ... gv a try .
- Replies: 13
- Views: 1683
- by catseye
Thu Apr 28, 2011 10:53 pm- Forum: Sentence Correction
- Topic: variations in Vs variations among
- Replies: 16
- Views: 6883
variations in Vs variations among
Geologists believe that the warning signs for a major earthquake may include sudden fluctuations in local seismic activity, tilting and other deformations of the Earth's crust, changing the measured strain across a fault zone, and varying the electrical properties of underground rocks. (A) changing ...
- by catseye
Tue Apr 26, 2011 9:39 am- Forum: Sentence Correction
- Topic: variations in Vs variations among
- Replies: 16
- Views: 6883
The valid sources to study GMAT are: 1. Official Guides 2. GMATPREP 3. Powerprep. And it is also good to practice questions from the following sources because these sources make questions on the basis of the concepts tested in GMAT. 1. BTG practice questions. 2. ManhattanGMAT 3. VeritusPrep. 4. kapl...
- by catseye
Sat Apr 23, 2011 9:54 am- Forum: Sentence Correction
- Topic: Modern critics are amused by early
- Replies: 10
- Views: 2091
Many investors base their choice between bonds and stocks on comparing bond yields to the dividends available on common stocks. (A) between bonds and stocks on comparing bond yields to (B) among bonds and stocks on comparisons of bond yields to (C) between bonds and stocks on comparisons of bond yi...
- by catseye
Sat Apr 23, 2011 8:43 am- Forum: Sentence Correction
- Topic: "comparisons of" vs "comparing"
- Replies: 8
- Views: 1817
I am well?
I have confusion about the two sentences:
I am well.
I am good.
Which one is correct? Why is one of them wrong?
Would any expert explain?
Thanks.
- by catseye
Fri Apr 22, 2011 10:41 am- Forum: Sentence Correction
- Topic: I am well?
- Replies: 7
- Views: 1550
@Stuart Kovinsky,
Thanks for wonderful explanation.
What is the problem in using "the slowness of the growth of forests"?
Thanks.
- by catseye
Thu Apr 21, 2011 9:11 pm- Forum: Sentence Correction
- Topic: Expert way to eliminate the wrong choices.
- Replies: 11
- Views: 1576