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Which of the following correctly lists the data sets in order of least
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23 Dec 2014, 09:06
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Tough and Tricky questions: Statistics and Sets Problems Which of the following correctly lists the data sets in order of least to greatest standard deviation? I. 2, 13, 55, 12, 14, 64 II. 32, 32, 32, 32, 32, 32 III. 37, 38, 39, 40, 41, 42 A. I, II, III B. I, III, II C. II, I, III D. II, III, I E. III, II, I Kudos for a correct solution.
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Re: Which of the following correctly lists the data sets in order of least
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24 Dec 2014, 01:58
Bunuel wrote: Tough and Tricky questions: Statistics and Sets Problems Which of the following correctly lists the data sets in order of least to greatest standard deviation? I. 2, 13, 55, 12, 14, 64 II. 32, 32, 32, 32, 32, 32 III. 37, 38, 39, 40, 41, 42 A. I, II, III B. I, III, II C. II, I, III D. II, III, I E. III, II, I Kudos for a correct solution.out of three given sets, II has all numbers same, so it has zero standard deviation hence it is Least only answer choices C and D have II in least position. Out of I ans III III has consecutive numbers , hence all are closedly spaced hence std deviation will be less while in I,numbers are spread widely hence std deviation should be more than III hence order should be II, III,I IMO D can someone please validate if this is correct?



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Re: Which of the following correctly lists the data sets in order of least
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08 Jan 2015, 06:39
Bunuel wrote: Tough and Tricky questions: Statistics and Sets Problems Which of the following correctly lists the data sets in order of least to greatest standard deviation? I. 2, 13, 55, 12, 14, 64 II. 32, 32, 32, 32, 32, 32 III. 37, 38, 39, 40, 41, 42 A. I, II, III B. I, III, II C. II, I, III D. II, III, I E. III, II, I Kudos for a correct solution. OFFICIAL SOLUTION:(D) To answer a question such as this, you DO NOT need to know how to calculate standard deviation. You simply need to understand how to compare standard deviations of different sets. The more spread out the numbers are, the greater the standard deviation will be. Even one or two numbers that are much larger or smaller than the others will cause the standard deviation to rise drastically. Here, there is a very small variation in the terms of set II, so it has the smallest standard deviation. Set III has some variation, but the terms are very close to each other, so it has the next larger standard deviation. Finally, set I has two terms (18 and 64) that are far from the other four terms. Therefore, set I has the largest standard deviation. So the correct order from least to greatest standard deviation is II, III, I. The correct answer is choice (D).
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Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
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Re: Which of the following correctly lists the data sets in order of least
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08 Jan 2015, 06:51
STANDARD DEVIATION: It is a variation from the mean value or when plotted on graph it shows dispersion from the mean. So lets see the problem: I. 2,12,13,14,55,64..................... data are dispersed in wide range from 2 to 64. II. No deviation as mean is 32 only. III. Dispersed data but in very low range 37 to 42 as compared to 'I' Answer is clearly II, III,I. Why to take pain of solving it ?? Bunuel wrote: Tough and Tricky questions: Statistics and Sets Problems Which of the following correctly lists the data sets in order of least to greatest standard deviation? I. 2, 13, 55, 12, 14, 64 II. 32, 32, 32, 32, 32, 32 III. 37, 38, 39, 40, 41, 42 A. I, II, III B. I, III, II C. II, I, III D. II, III, I E. III, II, I Kudos for a correct solution.
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Re: Which of the following correctly lists the data sets in order of least
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26 Jan 2015, 22:22
Bunuel wrote: Tough and Tricky questions: Statistics and Sets Problems Which of the following correctly lists the data sets in order of least to greatest standard deviation? I. 2, 13, 55, 12, 14, 64 II. 32, 32, 32, 32, 32, 32 III. 37, 38, 39, 40, 41, 42 A. I, II, III B. I, III, II C. II, I, III D. II, III, I E. III, II, I Kudos for a correct solution.Hi Bunuel I just took the 1st test from 800 score and the official question is as follows Which of the following correctly lists the data sets in order of least to greatest standard deviation? I. 18, 25, 25 , 25, 26, 64 II. 32, 32, 32, 30, 32, 32 III. 37, 38, 39, 40, 41, 42 I know I has the greatest SD but I am unable to figure out how to compare II & III  Which has a greater SD ?Pls explain Thanks



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Re: Which of the following correctly lists the data sets in order of least
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29 Dec 2015, 19:11
buddyisraelgmat wrote: Bunuel wrote: Tough and Tricky questions: Statistics and Sets Problems Which of the following correctly lists the data sets in order of least to greatest standard deviation? I. 2, 13, 55, 12, 14, 64 II. 32, 32, 32, 32, 32, 32 III. 37, 38, 39, 40, 41, 42 A. I, II, III B. I, III, II C. II, I, III D. II, III, I E. III, II, I Kudos for a correct solution.Hi Bunuel I just took the 1st test from 800 score and the official question is as follows Which of the following correctly lists the data sets in order of least to greatest standard deviation? I. 18, 25, 25 , 25, 26, 64 II. 32, 32, 32, 30, 32, 32 III. 37, 38, 39, 40, 41, 42 I know I has the greatest SD but I am unable to figure out how to compare II & III  Which has a greater SD ?Pls explain Thanks Hi buddyisraelgmat, Arranging II: 30,32,32,32,32,32. Mean is close to 32 All elements except 30 are 32. Set III: 37, 38, 39, 40, 41, 42. Mean is 39.5 [ (39+ 40)/2 ] You can see that the elements in Set III are more widespread from the mean than are the elements in Set II. Thus SD(III)>SD(II) Alchemist14



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Re: Which of the following correctly lists the data sets in order of least
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12 Oct 2017, 06:12
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Re: Which of the following correctly lists the data sets in order of least &nbs
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