What is Ranking: Definition and 96 Discussions

A ranking is a relationship between a set of items such that, for any two items, the first is either "ranked higher than", "ranked lower than" or "ranked equal to" the second.
In mathematics, this is known as a weak order or total preorder of objects. It is not necessarily a total order of objects because two different objects can have the same ranking. The rankings themselves are totally ordered. For example, materials are totally preordered by hardness, while degrees of hardness are totally ordered. If two items are the same in rank it is considered a tie.
By reducing detailed measures to a sequence of ordinal numbers, rankings make it possible to evaluate complex information according to certain criteria. Thus, for example, an Internet search engine may rank the pages it finds according to an estimation of their relevance, making it possible for the user quickly to select the pages they are likely to want to see.
Analysis of data obtained by ranking commonly requires non-parametric statistics.

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  1. K

    A ranking of college majors by IQ score

    I saw a similar study by Yale psychologists, the results were roughly the same (they were mostly 1 or 2 points higher in most categories). http://www.statisticbrain.com/iq-estimates-by-intended-college-major/ Legally "mentally handicapped" person's IQ < 70 Average IQ = 100 by definition...
  2. R

    Comparing Brown & UC Boulder: The Horrible Ranking Game

    There's a lot of background information that I'll spare you guys, but I'm currently on leave from Brown and am considering going to UC Boulder instead and am just curious how the programs might compare, what my graduate prospects will be, and so forth. Actually, some background: I transferred...
  3. M

    Schools Best engineering schools on the world. ( not by QS ranking)

    I was considering about best engineering schools. USA universities are best we have to admit it. Unfortunately i can not get a scholarship to study on MIT so... pity. I have to chose between Japanese Universities and Swiss Universities... You as more advanced students. professors would you...
  4. S

    What are the best rules/guidelines for determining statistical ranking methods?

    Greetings All! I have what appears to be the most difficult question in the world based on the absence of even a single answer found on Google. I am looking for statistical ranking methods/rules/guidelines, etc. I work with data that is the result of taking continuous data (distance) and...
  5. D

    ELO chess ranking system applied incorrectly in video games

    Are there any chess players, statisticians, or smart people who are familiar with the ELO ranking system? This concerns a game with at least over 100,000 players, so its not an obscure concern. Basically, I play an online video game that tries to apply an ELO ranking system to rank...
  6. T

    Comparing Carnot & Ranking Cycles + Steady Flow Energy Equation

    Please i need answer for this questions A- compare the Carnot cycle with the Ranking Cycle B- State The Steady Flow Energy equation and discuss the Origin and definition of each of the terms c- A vapour compression refrigeration using ammonia works at a condenser temperature of 40C and...
  7. A

    Static Friction and Frictional Force Ranking Task of Crate

    Below are six crates at rest on level surfaces. The crates have different masses and the frictional coefficients [the first value is the static friction and the second is the kinetic friction] between the crates and the surfaces differ. The same external force is applied to each crate, but none...
  8. W

    Ranking question with different number of observations?

    I need to rank multiple "subjects" such as listing the "subjects" from best to worst. <--not sure if subject is the correct term. example: school A and school B school A has 10 students with an average score of 100% school B has 30 students with an average score of 98% which school would be...
  9. J

    Magnetic Field and Electric Field Ranking Task

    Homework Statement First of all, the image for this problem is in an attachment (Jpeg), if you cannot view it let me know and I can change the format. A positively charged particle moves through a region with uniform electric field pointing toward the top of the page and a uniform...
  10. O

    Steam plant operates with ideal reheat -regenerative Ranking cycle.

    Question: http://i1179.photobucket.com/albums/x393/mariaschiffer/img017.jpg Can anyone please check whether this answer is right.Thanks in advance Answer: Pressure of the closed feed water heaterP4=1MPa Take the extracted pressure from the second turbine P11=0.3MPa Operating pressure...
  11. O

    Steam plant operates with ideal reheat -regenerative Ranking cycle.

    Question : http://i1179.photobucket.com/albums/x393/mariaschiffer/img017.jpg Can anyone please double check if this answer is right. Thanks in advance. Answer : Pressure of the closed feed water heaterP4=1MPa Take the extracted pressure from the second turbine P11=0.3MPa Operating...
  12. D

    Ranking capacitors by the potential difference across them.

    I have a circuit that is in a read only file so I can't get an image on here so I will try to create it on here B-battery C-capacitor ----C1------------- l.....l...l B...C2...C3 l.....l...l -------------------- Ignore the periods (.) because they are just place holders. The...
  13. A

    Ranking the following from most stable to least stable

    I need help ranking the following from most stable to least stable: -(CH3)2C=CHCH2 with dot over the CH2 -(CH3)2CHCHCH3 with dot over the 2nd CH -(CH3)2CCH2CH3 with dot over the C -(CH3)2CHCH2CH2 with dot over the CH2 the dots represent the primary, secondary, and tertiary radicals...
  14. C

    Internal-Combustion Engine Prototypes Ranking Task?

    Homework Statement Rank these engines on the basis of their designed power output and their thermal efficiency. 1) Qin = 3000 J, Qout = 1500 J, f=150 Hz. 2) Qin = 4000 J, Qout = 3000 J, f=50 Hz. 3) Qin = 1000 J, Qout = 200 J, f=200 Hz. 4) Qin = 2000 J, Qout = 500 J, f=50 Hz. 5) Qin...
  15. V

    Ranking materials in order of their refraction index.

    Hi everyone I'm having a bit of trouble solving this question. If anyone can help that would be awesome Homework Statement Rank the materials in the diagram according to their refractive indices from greatest to smallest (see attachment) The attempt at a solution The greater the...
  16. O

    Profitability Ranking (basic markets)

    Hello! I've come here today seeking information about how I can build a ranking system that will sort through some data I have gathered about a particular market and then rank items in order of profitability using this data. For those interested in the data-set it's from a game called EVE...
  17. S

    Charged Particles Moving in a Magnetic Field Ranking Task

    Homework Statement Five equal-mass particles (A–E) enter a region of uniform magnetic field directed into the page. They follow the trajectories illustrated in the figure. Homework Equations The Attempt at a Solution i used the formula v=qBr/m got the following "A,B,C=E,D"...
  18. S

    Brightness of Light Bulbs Ranking Task

    Homework Statement Consider a circuit containing five identical light bulbs and an ideal battery. Assume that the resistance of each light bulb remains constant. Rank the bulbs (A through E) based on their brightness. Rank from brightest to dimmest. To rank items as equivalent, overlap them...
  19. S

    Thermal Conductivity Ranking Task

    Hi :) I'm having difficulty with finding the relationship between specific heat, c, and thermal conductivity, k and cannot answer these questions - Six objects are placed in a 500 F (260 C) oven and allowed to reach thermal equilibrium. Each object has a mass of 1.0 kg . The specific heat and...
  20. L

    Ranking velocities of particles in uniform magnetic field

    1. Five equal-mass particles (A–E) enter a region of uniform magnetic field directed into the page. They follow the trajectories illustrated in the figure. Rank from largest to smallest velocity 2. qvBsin(theta) = ma qvB = ma = m(v^2/r) v = qBr/m 3. Based on their...
  21. B

    Schools What is the best university ranking table in uk?

    Hey all So far I've found three main university ranking tables but there are few difference for an example Hertfordshire uni for physics according to guardian 16 while according to Times online it's 40 and according complete uni guide it's 43.so i am confused .I know that it can be some...
  22. P

    Should I enroll in a low ranking MBA program?

    I spend a year in an EE PhD program and decided it wasn't for me. I took a one year leave of absence and I haven't decided if I want to return. I might return but I would like to find a different research group. I am currently jobless and things are looking bleak in the job market. I am...
  23. I

    What Is the Percentile Rank of a 20-Year-Old Machine?

    Homework Statement 60% of all machines inspected were 20 years or older. Give a percentile ranking for the age of 20 years in the distribution of all ages of inspected machines. Homework Equations Don't think there are any that apply to this question :/ I found this equation...
  24. M

    Ranking the force of point charges problem

    Homework Statement 5 point charges; q1; charge = +q distance = d q2; charge = +2q distance = 3d q3; charge = -3q distance = 2d q4; charge = -4q distance = 3d q5; charge = -5q distance = 2d are placed in the vicinity of an insulating spherical shell with a charge (+Q), distributed...
  25. M

    Ranking the force of point charges

    Homework Statement 5 point charges; q1; charge = +q distance = d q2; charge = +2q distance = 3d q3; charge = -3q distance = 2d q4; charge = -4q distance = 3d q5; charge = -5q distance = 2d are placed in the vicinity of an insulating spherical shell with a charge (+Q), distributed...
  26. K

    Method for ranking multiple items based on a population of rankings?

    Imagine that I want to rank the top 3 foods of all time. I want to ask ten different people to answer this question. So I get answers such as: Mashed Potatoes > Artichokes > Carrots Beef Jerky > Mashed Potatoes > French Fries ...etc. Is there an established method or algorithm for...
  27. B

    Reflection and Refraction Ranking by Phase Shifts

    1. A ray of light is incident onto the interface between material 1 and material 2. There is a figure, which is a standard figure of a ray in medium of n1 striking an interface where medium2 (with n2) meets medium1. As is typical, some of the light is reflected and some is refracted. The...
  28. A

    Medical physics program ranking

    Hi everyone, Just wondering if anyone has an idea of the rankings among CAMPEP accredited programs? Specifically, which programs are geared more towards students pursuing academia versus students pursuing clinic. thanks
  29. P

    Ranking the Ionization Energy of Ne, F, P, and Be

    Homework Statement Rewrite each of the following lists from largest to smallest value of each property: First Ionization Energy Be, P, Ne, F Homework Equations Our book says the general trend for ionization energy on the periodic table is to increase from left to right and...
  30. I

    Ranking tension in different crates

    Homework Statement Seven crates of various masses are being pulled by ropes to the right, at the same constant speed, as shown below. Assume the ropes are massless, and the coefficient of kinetic friction between crates and floor is the same for all seven crates. Rank the ropes according to...
  31. S

    Ranking induced emfs and currents {Faraday's Law}

    Hey everyone, I'm having trouble with b and c and any help would be appreciated! I attached two pictures on the bottom (one of the entire problem and one of just the diagram) Homework Statement Five loops are formed of copper wire of the same gauge (cross-sectional area). Loops 1-4 are...
  32. robphy

    US News - Ranking of Graduate Programs

    If you like rankings, here's the latest from "US News" http://grad-schools.usnews.rankingsandreviews.com/grad PHY: http://grad-schools.usnews.rankingsandreviews.com/grad/phy/search MAT: http://grad-schools.usnews.rankingsandreviews.com/grad/mat/search Of course, one should question how...
  33. H

    UC San Diego Engineering School: Research & Ranking

    Hi all. How's the research and ranking of the engineering school of UC San Diego? Do you think it is a top tier school in the US?
  34. E

    Electric Potential Ranking Task

    In the figure (se attached) there are two point charges, +q and -q . There are also six positions, labeled A through F, at various distances from the two point charges. Rank the locations A to F on the basis of the electric potential at each point. Rank positive electric potentials as larger...
  35. J

    Google's page ranking algorithms

    A few days ago I started a thread here on physicsforums about a new article on climate change. Yesterday I was using google to find out more about some related research. To my surprise the thread I started was on top when searching using some but rather generic keywords. If you google using...
  36. E

    Ranking Lewis Acids: Weak to Strong - Resources & Tables

    Hello, Just wondering if anyone could post some resources on lewis acids: ie weak to strong lewis acid ranking or maybe some table or chart of lewis acids and their reactivity I haven't been able to find any resources thus far regarding lewis acids and their reactivity rankings... ...
  37. S

    Solving a Ranking Task: F, A, C, E, B, D

    Im having trouble figuring out how to solve this ranking task, I've tried nearly everything and I'm not getting the right answers. http://wps.prenhall.com/wps/media/objects/223/229290/rt/pdf/work068.pdf .. the answer are F, A, C, E, B, D where A and C are equal.
  38. P

    Ranking of the properties of these things?

    Is the following correct? Handle of frying pan should have high thermal conductivity while the pan should have low thermal conducitivty. Coffee cup should have low thermal conductivity. Covering for Electrical wiring should have low electrical conductivity
  39. S

    Where Do HCl and NaOH Rank in Polarity Among Organic Compounds?

    Rank these compounds from least to most polar. These are the following organic compounds that I ranked in increasing polarity: hexane (nonpolar) methylene chloride ethyl alcohol methyl alcohol water (polar) Now there are two inorganic compounds that I don't know how to place in...
  40. M

    Ranking the E-field from a graph alittle confused.

    Figure 24-27 gives the electric potential V as a function of x. Figure (a) Rank the five regions according to the magnitude of the x component of the electric field within them, greatest first (use only the symbols > or =, for example 2=4>1=3>5). I got the other 2 parts (b) and (c)...
  41. M

    Ranking E field in equipotential surfaces, confused

    Hello everyone I'm confused on this topic. I read about it in the book and it made sense though. The question is: Figure 24-25 shows three sets of cross sections of equipotential surfaces; all three cover the same size region of space. Diagram: http://www.webassign.net/hrw/25_29.gif (a)...
  42. G

    Ranking of Quantum Mechanics interpretations?

    Is there somewhere something like a ranking of the different interpretations of Quantum Theory, from the most widely embraced by physicists to the least? Something like physicists voting in a poll ...
  43. B

    Top five schoolboard, world ranking

    Which schools are top five about mathematics ? Which schools are top five about computer science ? Which schools are top five about physics ? and which schools are top five about biology ?
  44. M

    Ranking 4 numbered points according to net electric field

    Hello everyone. I'm having problems figuring out this check point. I have attached an image that has the diagram. Incase you can't read the picture it says: The figure shows two large, parallel, noconducting sheets with identical positive uniform surface charge densities, and a sphere with a...
  45. Monique

    Does paying Google for ads guarantee a top ranking in search results?

    Is it true that websites that pay google money, will end up in the top of the ranking when doing a search?
  46. W

    Ranking Items for Survival on the Moon

    Ive sure everyones seen these in there life or at least has an idea what I am talking about. The problem is your on the moon and only have these 15 items to survive, and you are supposed to organize the list from 1-15 in order of importance. The items are... *Box of matches *Food concentrate...
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