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Forum: Applied Statistics

Statistics in finance, economics, engineering. Actuarial science. Econometrics. Operations research.

  1. Could you take a look at this please? Feedback wanted.

    (There was a question and a link to a draft tutorial here.) UPDATE: Hi again. I received feedback. Many thanks. Will go ahead and produce the...

    Started by Loffy‎, 06-05-2013 04:01 PM
    • Replies: 0
    • Views: 1,354
    06-05-2013, 04:01 PM Go to last post
  2. Simple Calculation

    I could use a little, help. I was reviewing an article that gave a basic recommendation for the resampling number for bootstrapping (number of...

    Started by hlsmith‎, 06-04-2013 09:50 AM
    • Replies: 2
    • Views: 1,818
    06-04-2013, 03:19 PM Go to last post
  3. Suggested readings for non-linear regression

    I have not worked much with non-linear or robust regression, but am trying to learn it. Any suggestion for articles, books, or links to read.

    Started by noetsi‎, 05-29-2013 01:28 PM
    • Replies: 2
    • Views: 1,524
    05-30-2013, 02:54 PM Go to last post
  4. Missing at Random

    I have a large dataset where I am calculating a time measurement from two events with many immediate events in between them. Moreover, there are many...

    Started by hlsmith‎, 05-30-2013 09:56 AM
    • Replies: 1
    • Views: 1,817
    05-30-2013, 10:36 AM Go to last post
  5. Time series analysis of causes of congestion

    Hello, I have tried to find a post on the forum which covers this topic so apologies if this question has already been answered. I am wanting...

    Started by learnerchris‎, 05-27-2013 09:17 PM
    cross correlation, relationship, time series analysis
    • Replies: 1
    • Views: 1,837
    05-28-2013, 06:56 AM Go to last post
  6. Question Significant and not significant depending on the test. What to trust?

    Hi. I'm a PhD student in the field of Bioengineering (sorry in advance for my poor english, btw). I'm analyzing some data to be included in a...

    Started by Proton_v‎, 05-27-2013 11:31 AM
    advice needed, anova, getting crazy, kolmogorov-smirnov
    • Replies: 3
    • Views: 1,956
    05-28-2013, 02:33 AM Go to last post
  7. Question what are contrasts?

    Hi, I am doing homework for an assignment in statistics. I cannot get my mind up for what contrasts are. Anyone can explain that in simple words? ...

    Started by stablum‎, 05-22-2013 09:38 AM
    • Replies: 5
    • Views: 2,160
    05-23-2013, 03:30 PM Go to last post
  8. Determining the power of a 2-Sample T-Test

    So I am running a two-sample t-test , and wanted to set some preliminary accuracy goals. Ideally, I wanted to end the test when there was a...

    Started by smithosaurus‎, 05-20-2013 04:58 PM
    power, t-test, two-sample t-test
    • Replies: 7
    • Views: 2,886
    05-21-2013, 04:47 PM Go to last post
  9. Question Business Intelligence / Reporting for website - Percentiles and comparability

    Hey guys, I am currently facing some difficulty with my Bachelor's thesis, as I lack the proper quantitative skills to solve a problem on my own:...

    Started by mmmarius‎, 05-20-2013 10:02 PM
    benchmarking, percentiles, reporting
    • Replies: 0
    • Views: 1,346
    05-20-2013, 10:02 PM Go to last post
  10. Statistics for surveys

    We generate surveys where we ask our customers about the quality of service provided. Responses are likert scale commonly (strongly agree, agree...

    Started by noetsi‎, 05-07-2013 06:29 PM
    • Replies: 1
    • Views: 1,154
    05-20-2013, 11:27 AM Go to last post
  11. Newbie to stats - comparing pre & post test results with missing data

    Hi I'm a complete beginner to stats and I can't work out how I can analyse some data with SPSS despite it being very simple on the surface. I...

    Started by miksima‎, 05-17-2013 06:15 PM
    missing data means
    • Replies: 2
    • Views: 2,442
    05-18-2013, 03:39 AM Go to last post
  12. How would I determine significant factors for a conditional drop?

    Hi, I have a financial data set of company-specific financial returns post a recurring event. I am interested in determining which factors would...

    Started by badmax‎, 05-16-2013 06:09 PM
    • Replies: 0
    • Views: 2,043
    05-16-2013, 06:09 PM Go to last post
  13. Estimating arrival and purchase rates using exponential distribution

    Hello, Thank you for reading my post. I work for a marketing firm that represents pop-up stores. I would like to provide a prospective...

    Started by dyudovsky‎, 05-15-2013 12:27 AM
    • Replies: 6
    • Views: 4,123
    05-16-2013, 11:15 AM Go to last post
  14. Econometrics question

    Econometrics question: http://i.imgur.com/dCHdGnm.png I would like to check that my answers are correct: for a. I wrote that it would be a DF test...

    Started by Falc‎, 05-16-2013 05:02 AM
    • Replies: 0
    • Views: 2,374
    05-16-2013, 05:02 AM Go to last post
  15. Probability Distribution of a Subset

    I was wondering, if you have a set with data that follows a certain probability distribution, will the subset have that same distribution? Lately...

    Started by ElaB‎, 03-22-2013 01:56 PM
    probability, set, subset
    • Replies: 7
    • Views: 4,510
    05-11-2013, 04:59 AM Go to last post
  16. Multiple response variable missing

    If I have a multiple response variable and none of the categories is checked, the subject should be coded as missing right? EX Race RWhite...

    Started by Marvin85‎, 05-07-2013 04:30 PM
    0 or missing, bad coding, missing, multiple response
    • Replies: 7
    • Views: 2,110
    05-08-2013, 12:17 PM Go to last post
  17. Thumbs up repeated analysis

    Hi my friends my dependent variable Y is measured for 5 years and had value 0 or 1 ( for five year the dependent variable is 1 or 0 not for each...

    Started by Biostat‎, 04-28-2013 10:06 AM
    • Replies: 2
    • Views: 1,315
    04-29-2013, 10:23 PM Go to last post
  18. Sales modelling

    Hello everyone, First of all I have to apologize about how little I remember those statistics lessons from my study time. So try to be...

    Started by karma67‎, 04-27-2013 07:44 AM
    • Replies: 1
    • Views: 1,465
    04-27-2013, 08:53 PM Go to last post
  19. Facebook data for academic research?

    Hi Everybody, I know this is a long shot, but I need to start somewhere. I am wanting to use facebook data as part of my dissertation... the only...

    Started by Salohcin‎, 04-02-2013 02:52 PM
    • Replies: 2
    • Views: 1,884
    04-27-2013, 04:12 PM Go to last post
  20. Distributions for sales

    Hi, I have a problem that I just cannot find a solution to. What type of distribution would salaries follow in, for example, the US? I would be...

    Started by LENNY1‎, 04-27-2013 12:47 PM
    • Replies: 0
    • Views: 1,156
    04-27-2013, 12:47 PM Go to last post
  21. missing (aid disbursements) data: some questions

    hello to you all i have some questions concerning how to treat missing data in my specific case (i am currently writing my bachelor thesis in...

    Started by tiuan‎, 04-21-2013 01:52 PM
    • Replies: 2
    • Views: 2,383
    04-21-2013, 08:41 PM Go to last post
  22. disaster incidents, the role of statisticians

    I'm curious about the role statisticians are playing in, for example, the investigation of the recent incident in Boston. Any one have insight? or...

    Started by soxi‎, 04-19-2013 06:42 PM
    • Replies: 1
    • Views: 1,428
    04-19-2013, 08:40 PM Go to last post
  23. sports, finish times, world records, course records

    Anyone here working with sports data? Out of personal curiosity, I am interested in reading published analyses that assess the extent to which a new...

    Started by soxi‎, 04-19-2013 06:38 PM
    • Replies: 0
    • Views: 1,474
    04-19-2013, 06:38 PM Go to last post
  24. Finance: Question about two-sample Kolmogorov-Smirnov Test

    Hi I have two time series of market returns and I would like to test whether they are from the same distribution by using the Kolmogorov-Smirnov...

    Started by susu‎, 04-19-2013 09:43 AM
    • Replies: 4
    • Views: 3,779
    04-19-2013, 06:27 PM Go to last post
  25. Question Winsorizing Panel data (eliminating outlier overall or across firms)

    We have a panel data consisting of about 1000 firms with each about 150 monthly observations (Returns and distress measures such as Z-score). In...

    Started by finance_jan‎, 04-14-2013 03:40 AM
    outliers, panel data, return data, winsorize
    • Replies: 0
    • Views: 2,963
    04-14-2013, 03:40 AM Go to last post
  26. problems with summation notation :(

    hello everyone! i'm having a little bit of trouble with following a chain of identities using double-summation. i hope someone who's more...

    Started by will22‎, 04-11-2013 02:32 PM
    • Replies: 2
    • Views: 1,807
    04-11-2013, 03:01 PM Go to last post
  27. Exclamation Distance-based redundancy and 2-way repeated measures ANOVA

    I have data that consists of three different treatments (A, B, and C) on 22 patients (A:8, B:8, C:6). Measurements of bacterial composition were...

    Started by mgroves‎, 04-11-2013 02:29 PM
    • Replies: 0
    • Views: 1,454
    04-11-2013, 02:29 PM Go to last post
  28. Reject test results?

    Hi, For my master thesis I've done some compression tests on concrete samples. The results are graph in the graph below, where the stress is...

    Started by DeAI‎, 04-10-2013 10:43 AM
    • Replies: 7
    • Views: 1,640
    04-11-2013, 03:57 AM Go to last post
  29. Bonferoni correction

    I know what this is generally. What I am unclear on is exactly when you should use it. For instance I have seen this applied in some (rare) cases...

    Started by noetsi‎, 04-09-2013 12:33 PM
    • Replies: 2
    • Views: 1,789
    04-09-2013, 04:39 PM Go to last post
  30. Percentage of delayed samples. Ways to calculate?

    Hi I'm working on a thesis and I'm using a bit statistics to process the data. I have a population and in one sample (N=250) I measure the time it...

    Started by Katje‎, 04-05-2013 05:13 AM
    • Replies: 0
    • Views: 1,455
    04-05-2013, 05:13 AM Go to last post
  31. Comparing gender gap in elections with female candidates to elections with only male

    Hi all, First I would like to apologize if my description of my problem seems incomprehensible. As my english isn't exactly top notch and I find...

    Started by Xenu‎, 04-03-2013 01:51 PM
    • Replies: 1
    • Views: 1,519
    04-04-2013, 02:10 PM Go to last post
  32. Small sample and a discussion re: relevant analytical methods

    I have a small sample that I have analyzed with various methods, however I want to have a discussion with smarter people than I if there are...

    Started by Trolle‎, 03-22-2013 09:17 AM
    • Replies: 3
    • Views: 1,818
    04-01-2013, 05:13 PM Go to last post
  33. How to minimize variability in order to design a valid pricing experiment?

    Good morning, I want to run a pricing experiment to see the change in the number of purchases (i.e.demand) in response to a 10% increase in price...

    Started by onartova‎, 03-28-2013 10:04 AM
    experiment design, pricing, variation
    • Replies: 0
    • Views: 1,775
    03-28-2013, 10:04 AM Go to last post
  34. Inclusion of price index when regressing on real variables

    I'm currently trying to estimate a demand function from a set of real variables. Would it still make sense to include a price index as a regressor...

    Started by mocka‎, 03-28-2013 08:02 AM
    • Replies: 0
    • Views: 1,175
    03-28-2013, 08:02 AM Go to last post
  35. Event Study

    Hi, I'm new to the forum. I am trying to conduct an event study on the effect of a particular event on daily airline stock returns. I'm not sure...

    Started by rocker‎, 03-07-2013 08:34 AM
    • Replies: 1
    • Views: 1,621
    03-25-2013, 10:14 AM Go to last post
  36. LCROSS results: Given a 2σ upper limit can you get expected value?

    Hi all, this is my first post. I've looked everywhere else; maybe you guys can help me with what should be fairly simple question. It has to do...

    Started by Warren Platts‎, 03-23-2013 03:20 PM
    • Replies: 0
    • Views: 25,618
    03-23-2013, 03:20 PM Go to last post
  37. interpreting the results of maximal information-based nonparametric exploration

    Hello Friends, I am a newbee to stats. I am exploring a dataset from a time-tracker application. this application records the activities users do...

    Started by fighterjockey‎, 03-20-2013 07:27 AM
    • Replies: 1
    • Views: 2,327
    03-20-2013, 02:13 PM Go to last post
  38. Bivariate ranking versus marginal effects

    This is related to an ongoing project I struggle through.... I have a list of satisfaction variables (42) that are suspected of influencing...

    Started by noetsi‎, 03-19-2013 11:52 AM
    • Replies: 3
    • Views: 1,911
    03-19-2013, 04:02 PM Go to last post
  39. in economics; Market share change relative to market growth

    Hi all I am not professional neither in economics nor in statistics, and I was wondering if you could help me: I am working on a project that...

    Started by ilanatam‎, 03-19-2013 11:28 AM
    economics, market share
    • Replies: 1
    • Views: 1,741
    03-19-2013, 11:38 AM Go to last post
  40. Rates of implementation

    Hello all, I've tried to find this elsewhere but can't seem to determine how to do it. I want to determine the implementing rate of GPS technology...

    Started by kwak123‎, 03-19-2013 05:52 AM
    implementation, rates
    • Replies: 0
    • Views: 1,171
    03-19-2013, 05:52 AM Go to last post
  41. Job market for statisticans/quantitative data analyst

    I am, I found out today, giving a presentation to my previous graduate program on real world use of data. Does any one know job sites that people can...

    Started by noetsi‎, 03-18-2013 07:04 PM
    • Replies: 0
    • Views: 1,748
    03-18-2013, 07:04 PM Go to last post
  42. Increasing accuracy of measurements.

    My lab has an Relative humidity analyser which states it is accurate to plus or minus 5%. If I use two similar analysers and take the average does...

    Started by nigmyk‎, 03-18-2013 06:59 PM
    accuracy of measurement, relative humidity
    • Replies: 0
    • Views: 2,022
    03-18-2013, 06:59 PM Go to last post
  43. Exclamation Significance testing of proportions without knowing the sample size

    I have a multivariate data set consisting of two groups with 5 specimens each. The data set describes types of bacteria in the gut of mice from two...

    Started by mgroves‎, 03-18-2013 10:54 AM
    • Replies: 0
    • Views: 3,529
    03-18-2013, 10:54 AM Go to last post
  44. Unconditional statistical test

    Hello, I am a student in translation and must translate a text about the economic impact of the Olympic Games in which there are quite a few terms...

    Started by SgtBob‎, 03-06-2013 05:23 AM
    • Replies: 8
    • Views: 2,478
    03-18-2013, 08:48 AM Go to last post
  45. Expert judgement and GARCH

    According to the efficient market theory, we can't predict the world tomorrow (e.g. future stock prices or exchane rates). Although, I have read some...

    Started by Englund‎, 03-15-2013 01:03 PM
    • Replies: 3
    • Views: 1,677
    03-15-2013, 07:06 PM Go to last post
  46. Exclamation NEED HELP with understanding when to use what method

    I have been trying to familiarize myself with statistics but I'm getting confused on what methods to use when answering what questions. For...

    Started by mgroves‎, 03-12-2013 03:56 PM
    confused ecologist, multivariate, statistical tests
    • Replies: 3
    • Views: 1,698
    03-15-2013, 02:41 PM Go to last post
  47. Correlation based on binary events

    I have a system with 5 components. Every 10 seconds the signal travels to all of them and I know how many of them responded. I need to know there...

    Started by Vatsa‎, 01-31-2013 11:50 AM
    • Replies: 2
    • Views: 2,147
    03-14-2013, 11:51 AM Go to last post
  48. GLM questions for landscape experiment

    I am analyzing bird count data from surveys conducted each week (from Nov-April, when bird foraging most active near breeding cycle) for 6 years in 9...

    Started by Kayaker‎, 03-04-2013 11:38 PM
    count data, experiment design, glm, negative binomial, repeated measures
    • Replies: 1
    • Views: 1,373
    03-13-2013, 11:57 PM Go to last post
  49. Hypothesis testing I did the calculations but Am I correct?

    Hello, I am trying to check my work on hypothesis test I did on a two sample data set. I am comparing the means. One sample has 340 data points and...

    Started by SATNOV‎, 03-13-2013 08:57 AM
    • Replies: 2
    • Views: 1,842
    03-13-2013, 01:43 PM Go to last post
  50. Unbalanced, repeated measures two-way anova?

    I have a set of test data that I need to analyse. I have results from between 4-6 (X) samples (same material), at two different speeds (A-B), tested...

    Started by La82‎, 03-07-2013 06:07 AM
    • Replies: 2
    • Views: 5,515
    03-11-2013, 02:02 PM Go to last post
  51. Picking a subset of data points in multidimensional space

    Hi I am looking for a way to reduce data points in a multidimensional matrix. Example: Variable 1: A1, A2, A3 Variable 2:

    Started by mik11279‎, 03-11-2013 09:33 AM
    • Replies: 0
    • Views: 1,824
    03-11-2013, 09:33 AM Go to last post
  52. Whats the best way to analyse the correlation between these two variables?

    Hello All, I have to admit my statistics skills are not amazing however, i'm very interested in improving my knowledge. I've been trying to work out...

    Started by joshuanathan‎, 02-26-2013 05:40 PM
    correlation, finance, war risk
    • Replies: 8
    • Views: 3,381
    03-05-2013, 12:06 PM Go to last post
  53. Methods to study

    Note that this is for very applied research (effectively in a business environment) and I lack the genius some here have (a vast understatement).:p...

    Started by noetsi‎, 03-04-2013 03:18 PM
    • Replies: 6
    • Views: 2,132
    03-05-2013, 12:49 AM Go to last post
  54. Multivariate data set of two groups: finding which variables are statistically diff.

    I have a data set consisting of two different groups (A and B) each with 5 specimens. We tested 73 different variables in each specimen and recorded...

    Started by mgroves‎, 03-02-2013 05:37 PM
    ecological statistics, multivariate analysis, significance testing
    • Replies: 7
    • Views: 2,268
    03-04-2013, 05:37 PM Go to last post
  55. Smile cumulative distribution function

    Hello to everyone and thanks for your time. I have a variable theta, distributed normally. I have a function V. I know how to calculate the...

    Started by bizan‎, 03-02-2013 12:09 PM
    cumulative cdf
    • Replies: 2
    • Views: 1,605
    03-02-2013, 01:07 PM Go to last post
  56. Measuring the value of an app

    Hello. So just finished running a fundraising event, and my team is trying to measure how much value having an app had and if it was worth it's...

    Started by wizuriel‎, 02-22-2013 02:34 PM
    • Replies: 4
    • Views: 2,095
    02-25-2013, 03:30 PM Go to last post
  57. Distorted risk measures

    So I was reading about a couple of risk measures (Wang's transform risk measure and Proportional Hazard risk measure) in a pdf document that I found...

    Started by BrownianMan‎, 02-22-2013 05:00 PM
    • Replies: 2
    • Views: 1,212
    02-22-2013, 05:54 PM Go to last post
  58. Non-Stationary Series and Standard Deviation

    Hello I am trying to model a non-stationary series for the purpose of outlier detection. The series is not labeled as normal and abnormal, which...

    Started by i pluto‎, 02-19-2013 06:24 PM
    • Replies: 0
    • Views: 3,681
    02-19-2013, 06:24 PM Go to last post
  59. Interest Rates and ARIMA models

    Hello, My goal is to forecast t-bill/note interest rates to help determine whether it'd be useful to purchase an interest rate swap on a loan (25...

    Started by jktunney‎, 02-13-2013 04:35 PM
    • Replies: 8
    • Views: 5,798
    02-19-2013, 03:27 PM Go to last post
  60. Multivariate Outliers Detection

    Hello all, Can you please comment on the outlier detection of multivariate data. When I need to detect outliers for a data of say 118 variables...

    Started by Biofan‎, 02-09-2013 02:39 AM
    • Replies: 11
    • Views: 3,595
    02-19-2013, 03:08 AM Go to last post

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