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Forum: Applied Statistics

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

  1. Confidence Interval: for a historical return series?

    Hello, I work in asset management, and I've been doing research on equity funds. I've pulled historical return and standard deviation data for...

    Started by Student1990‎, 11-06-2013 09:10 PM
    • Replies: 0
    • Views: 1,309
    11-06-2013, 09:10 PM Go to last post
  2. Help with correlation methodology of ratio

    I have not had to use my stats skills since college but am now in a position to do so and am now in a position where I need to. I have two...

    Started by becca618‎, 11-06-2013 04:15 PM
    correlation method
    • Replies: 2
    • Views: 1,409
    11-06-2013, 04:59 PM Go to last post
  3. Error for combining multiple binomial distributions

    Lets say we have two processes and we want to know which has a higher success rate. So we do two sets of trials. process 1 gives 53 out of 606 and...

    Started by Wintersun‎, 10-28-2013 09:55 PM
    binomial, combining uncertainty, confidence bands, error bars, error on mean
    • Replies: 1
    • Views: 1,320
    11-06-2013, 02:54 AM Go to last post
  4. Trying to Determine the Likelihood of 2 Possible Outcomes Using Categories

    Hi, I'm a little rusty on my statistics, and have been struggling to figure out a somewhat easy way to resolve my issue. I'm looking at data...

    Started by tac383‎, 11-05-2013 11:13 AM
    • Replies: 6
    • Views: 1,630
    11-05-2013, 04:46 PM Go to last post
  5. Judging bias in assessment system with multiple assessors & scoring criteria

    I work for a grant giving charity and we use external assessors to help in our selection process. There are 30 applications for review. We have 6...

    Started by jerseandave‎, 11-05-2013 11:01 AM
    assessment, bias, judges, scoring
    • Replies: 0
    • Views: 1,733
    11-05-2013, 11:01 AM Go to last post
  6. Logit regression to evaluate real price test

    Dear statistically inclined people, I'm asking for your help in a real world price test evaluation. I've had two years of stats and econometrics...

    Started by Andul‎, 10-23-2013 05:13 AM
    econometrics, logit, price elasticity, price testing
    • Replies: 1
    • Views: 1,165
    10-31-2013, 08:20 PM Go to last post
  7. Need help for classification problem

    Hi, I'm trying to make an analysis but don't really know if what I have in mind makes sense and how to actually do it. So I have the following...

    Started by Selrahc‎, 10-30-2013 10:26 PM
    • Replies: 1
    • Views: 1,051
    10-31-2013, 07:54 PM Go to last post
  8. Mixed Model or Multiple General Linear Model?

    Well I have not used a mixed model in a long time and seemed to be confused. The scenario is that I have data for 14 people for a continuous...

    Started by hlsmith‎, 10-30-2013 09:16 AM
    • Replies: 2
    • Views: 2,116
    10-30-2013, 10:49 AM Go to last post
  9. Percent Correct > Chance

    Hey, quick question: I have response data (n=14) to a categorical quesiton with 5 potential answers that the respondent could have selected....

    Started by hlsmith‎, 10-24-2013 10:58 AM
    • Replies: 4
    • Views: 2,513
    10-28-2013, 08:57 PM Go to last post
  10. Searching for special methods

    Hi, my goal is to analyse some data, but I do not know which method I should use. I gave some tasks to a large amount of students and they solve...

    Started by Dotana‎, 10-27-2013 12:49 PM
    • Replies: 0
    • Views: 1,665
    10-27-2013, 12:49 PM Go to last post
  11. Need help - upper bound estimation

    Hello! I am making my college conclusion project, and my deadline is dreadfully close! I need to find out a way to estimate a variable, and I have...

    Started by Zeppelin17‎, 10-24-2013 11:44 PM
    solved, tolerance intevals
    • Replies: 3
    • Views: 1,740
    10-26-2013, 12:12 AM Go to last post
  12. Choosing correct measures of statistical dispersion

    Hi, I have question regarding choosing a measure of statistical dispersion. I have 20 different factories, where each factory consists of...

    Started by patrik.stack‎, 10-25-2013 02:40 AM
    • Replies: 0
    • Views: 1,473
    10-25-2013, 02:40 AM Go to last post
  13. Significance testing for biserial correlation

    Hi, I have run an analysis outlined below. It would be great if the group could tell me a) if this approach is appropriate and b) if the result is...

    Started by davespindler‎, 10-23-2013 05:22 PM
    pearson correlation, point-biserial
    • Replies: 2
    • Views: 2,076
    10-24-2013, 09:49 AM Go to last post
  14. Financial (present value) question

    Not a statistics question - but some do financial analysis here :p We calculate a benefit/cost ratio. Our cost occurs at the beginning of the...

    Started by noetsi‎, 10-23-2013 08:24 AM
    • Replies: 0
    • Views: 1,503
    10-23-2013, 08:24 AM Go to last post
  15. Best Approach from Stat's Pro

    Hey All, Looking for suggestions on how to approach this stats real-world problem. My company, Company B, gives out an award to one of 5...

    Started by keough09‎, 10-17-2013 04:14 PM
    • Replies: 1
    • Views: 1,551
    10-22-2013, 02:57 PM Go to last post
  16. Cool (Economics) Transition matrices: transition rates, activity rate

    Hello everyone... it's been a while. I have a question for the econometricians out there. I have active labor 1. I have the following...

    Started by Kabouterke‎, 10-19-2013 11:21 AM
    activity rate, econometrics, transition matrix, transition rate
    • Replies: 0
    • Views: 1,641
    10-19-2013, 11:21 AM Go to last post
  17. using neural network to predict outcome

    Hi all, I've been using a multilayer perceptron to build a classifiacation model in SPSS, and just need some help or direction on how to use the...

    Started by TheTransporter‎, 10-18-2013 11:27 PM
    • Replies: 0
    • Views: 1,589
    10-18-2013, 11:27 PM Go to last post
  18. Interesting comments on diagnostic test

    I found this interesting in part because it is different than the advice I have often encountered (which tends to move directly from a given...

    Started by noetsi‎, 10-14-2013 05:26 PM
    • Replies: 0
    • Views: 1,248
    10-14-2013, 05:26 PM Go to last post
  19. Sample Size Determination for Binomial Distribution

    How can I compute the minimum sample size for a binomial distribution? I'd like to perform a manual calculation as well as a calculation with the...

    Started by greg6363‎, 10-12-2013 04:12 AM
    • Replies: 2
    • Views: 1,486
    10-13-2013, 07:32 PM Go to last post
  20. Power Law Distribution

    Hi All, After reading some books on how stock market returns are better modelled by a power law distribution, I wanted to play with some data...

    Started by tejayshare‎, 10-12-2013 08:19 PM
    • Replies: 0
    • Views: 1,736
    10-12-2013, 08:19 PM Go to last post
  21. weighting for different channels of survey results

    I'm not a statistician, but i'm looking at some customer satisfaction survey questions and how to best weight them. we have three channels of...

    Started by etaf‎, 09-29-2013 02:54 AM
    • Replies: 2
    • Views: 1,826
    10-12-2013, 07:10 AM Go to last post
  22. Determining Intercept Value from Probability

    I just wanted to make sure I was not missing something. I have a probability for an intercept from a logistic model (probability = 0.56) and I want...

    Started by hlsmith‎, 10-11-2013 11:42 AM
    • Replies: 2
    • Views: 1,255
    10-11-2013, 08:31 PM Go to last post
  23. Time series questions

    Eventually a ecometrician will wonder by:yup: Ostrom suggests a measure of model value. You divide the RMSE of your forcast, by the RMSE of...

    Started by noetsi‎, 08-06-2013 01:00 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 4,825
    10-11-2013, 03:01 PM Go to last post
  24. Long feature list DOE

    Hi! I want to test how the size of a list of features influence a response rate. So how to take into account the fact that influence may come not...

    Started by gust‎, 10-10-2013 05:47 AM
    • Replies: 0
    • Views: 1,525
    10-10-2013, 05:47 AM Go to last post
  25. Basic log question for regression

    This continues to elude me although it is very basic. You use logs to transform data for various reasons - notably to make the data linear and deal...

    Started by noetsi‎, 10-08-2013 08:47 AM
    • Replies: 6
    • Views: 1,375
    10-08-2013, 02:17 PM Go to last post
  26. Need ideas for framework for relationship between time-based events and attrition

    I'd like to be able to find a relationship between automatic problem reports and customer attrition in an online service. When a customer...

    Started by aaronnonlinear‎, 10-07-2013 09:17 PM
    • Replies: 1
    • Views: 1,419
    10-08-2013, 08:43 AM Go to last post
  27. Conditional probabilities when trading options and forecasting

    Dear Statistics-Gurus, I am trying to figure out how to "combine" two dependent probabilities, namely the probability to forecast the market...

    Started by spjuliman‎, 10-05-2013 05:09 AM
    • Replies: 0
    • Views: 1,859
    10-05-2013, 05:09 AM Go to last post
  28. What methods to use...

    Hi all! I've not carried out statistical work for a very long time. Last time was when I was uni 7 years ago. I've found myself finally needing it,...

    Started by doesntknowth‎, 09-30-2013 08:38 AM
    • Replies: 8
    • Views: 2,003
    10-02-2013, 02:42 AM Go to last post
  29. Panel Data and Normality of Variables / Boxcox Transformation

    Hello, I'm trying to perform a panel regression using STATA. I have an unbalanced panel containing 313 companies over 15 years, 3005...

    Started by RAUFURS‎, 12-20-2012 06:55 PM
    • Replies: 1
    • Views: 4,919
    10-01-2013, 01:22 AM Go to last post
  30. do mean and median tend to converge as number of data points gets large?

    A low median means the data points are congregated at the low end of a range and that would produce a low mean as well. Is there a principal that...

    Started by asinshesq‎, 09-28-2013 06:02 AM
    • Replies: 10
    • Views: 6,110
    09-30-2013, 11:06 AM Go to last post
  31. Calculating standard error for category from data for sub-groups

    Hi, I have a large set of data along the lines of: Type 1 – x1 number of runs, y1 number of failures Type 2 – x2 number of runs, y2 number of...

    Started by laudrup‎, 09-12-2013 07:04 PM
    • Replies: 1
    • Views: 1,756
    09-29-2013, 05:21 AM Go to last post
  32. percentage below mean in a given range of income?

    Suppose I have a known number of people ("N") having a specified range of income (e.g. $1 through $1,000,000) and I know the mean income ("M") but...

    Started by asinshesq‎, 09-25-2013 08:23 AM
    • Replies: 2
    • Views: 1,538
    09-25-2013, 09:49 AM Go to last post
  33. Differences in time series modeling...

    Some time series techniques stress addressing problems with standard errors caused by autocorrelation. For example Cochrane-Orcutt, Yule-Walker etc....

    Started by noetsi‎, 09-23-2013 08:57 AM
    • Replies: 11
    • Views: 2,986
    09-24-2013, 01:01 PM Go to last post
  34. AR order

    I know that you can use ARIMA to determine an AR order. But there is obviously a lot of subjectivity in that. Does anyone know other ways to...

    Started by noetsi‎, 09-19-2013 10:44 AM
    • Replies: 3
    • Views: 1,782
    09-19-2013, 12:17 PM Go to last post
  35. Next weeks Net Sales Predictions using 5 years of data.

    Hi all, First, i need to do this on a work computer that does not have Internet access and is locked down. It is using Linux with with the...

    Started by Dycius‎, 09-14-2013 11:01 AM
    • Replies: 2
    • Views: 1,653
    09-18-2013, 10:56 AM Go to last post
  36. Correlation of Spatial Data

    Hi, I have 2 data sets X1 and X2. Both data sets contain various entries of geo spatial data (latitude and longitude). X1= X2 is just like X1 but...

    Started by HBKss‎, 09-18-2013 02:49 AM
    correlation, latitude, longitude, spatial
    • Replies: 0
    • Views: 1,479
    09-18-2013, 02:49 AM Go to last post
  37. Various Applied Stats Questions

    Hey guys, having some majorrr problems understanding some of these questions: 1)what's the difference between the regression estimates and the...

    Started by johnbold‎, 09-13-2013 11:44 PM
    • Replies: 0
    • Views: 1,183
    09-13-2013, 11:44 PM Go to last post
  38. small volume time series forecasting

    hi everyone, I'm doing forecasting for hospital monthly patient volume. For large hospitals, ARIMA model works well; but for small...

    Started by harry625‎, 09-13-2013 10:15 PM
    • Replies: 0
    • Views: 1,090
    09-13-2013, 10:15 PM Go to last post
  39. Comparison of time series

    I have two time series. The first is from a set of reports that have been used to guide policies. The method used to produce those reports is...

    Started by SlideRule‎, 03-10-2012 01:59 PM
    • Replies: 1
    • Views: 2,128
    09-13-2013, 08:26 PM Go to last post
  40. behavioral intent

    Dear Forum, I'm looking for advice on how to validate a measure of behavioral intent. here's a simplified example: let's say that I did a study...

    Started by rclukey‎, 09-12-2013 02:32 PM
    behavioral intent, surveys, validation
    • Replies: 0
    • Views: 1,156
    09-12-2013, 02:32 PM Go to last post
  41. Responses that are close but not correct

    I have a test, subjects completed the test. The test asks very specific questions and has categorical responses. The responses are a series of number...

    Started by hlsmith‎, 09-12-2013 10:00 AM
    • Replies: 0
    • Views: 1,570
    09-12-2013, 10:00 AM Go to last post
  42. Drivers of Firm Growth - Panel Data Analysis - Fixed (Within) vs. Between

    Dear all, first of all hi to you all, it's my first time being here. Some really confusing problem finally got me here after reading loads of...

    Started by TheOneAndOldi‎, 09-12-2013 04:31 AM
    • Replies: 0
    • Views: 2,058
    09-12-2013, 04:31 AM Go to last post
  43. I am not sure if one can do this?

    I have a list of 69 Clients and a list of 40 Employees. I also have a total of billable hours that these 40 employees will charge at the end of a 40...

    Started by tomstats‎, 09-09-2013 06:14 PM
    counting data
    • Replies: 0
    • Views: 1,455
    09-09-2013, 06:14 PM Go to last post
  44. Money and Risk Management in Forex

    Hello all! I'm barely jumping into the Forex Market, and I somewhat understand the concept of being a winner long term, but I want to actually see...

    Started by Apple Forex‎, 09-05-2013 01:31 PM
    • Replies: 4
    • Views: 1,833
    09-05-2013, 03:33 PM Go to last post
  45. Interpreting dummy variables

    I am interested in how a categorical variable varied on a pre and post test. I operationalize the DV as change from the pre to post test. Then I...

    Started by noetsi‎, 09-05-2013 11:23 AM
    • Replies: 2
    • Views: 1,545
    09-05-2013, 11:57 AM Go to last post
  46. Explaining Augmented Dickey Fuller Regression Output

    I have monthly returns data going back to 1991 and I'm trying to work out if the data has a tendency to mean revert over time. In order to work this...

    Started by Mattaj247‎, 09-03-2013 11:07 AM
    • Replies: 3
    • Views: 2,538
    09-05-2013, 09:09 AM Go to last post
  47. How to Compare three Data Series Collected by different means?

    I need to compare three different data series. The subject of the data is the same, but the collection method is different. My initial approach...

    Started by arineon‎, 09-04-2013 01:11 PM
    correlation, correlation coefficient
    • Replies: 3
    • Views: 1,836
    09-05-2013, 08:41 AM Go to last post
  48. Tailed linear regression - Interpretation

    Dear all, I would appreciate a lot if you could help me. I don´t know exactly if it is possible to Interpret correctly with the following results...

    Started by Agua‎, 09-01-2013 04:57 AM
    • Replies: 5
    • Views: 1,994
    09-04-2013, 11:25 AM Go to last post
  49. Question Regression, Impute? - calculate probable price for product given other product data

    Hi All I'm completely new to statistics; so apologies if this isn't in correct forum. Terms such as imputation and regression are all new to me! ...

    Started by omniscient‎, 08-30-2013 06:30 AM
    • Replies: 1
    • Views: 1,669
    09-03-2013, 09:36 AM Go to last post
  50. Augmented Dickey Fuller (ADF)

    There are three ways to do this, without an intercept, with it, and with a trend. It is not clear to me how you tell which to use for a given time...

    Started by noetsi‎, 08-30-2013 12:51 PM
    • Replies: 0
    • Views: 1,927
    08-30-2013, 12:51 PM Go to last post
  51. Terms

    This comes from time series although I think it is mean to be general. I am somewhat confused by the difference in bias and consistancy as used here....

    Started by noetsi‎, 08-27-2013 04:53 PM
    • Replies: 11
    • Views: 2,043
    08-28-2013, 03:48 PM Go to last post
  52. ANOVA interpretation

    I need help in interpreting some ANOVA results with 2 factors (genotypes and treatment). Each group was treated with saline then an hour later...

    Started by Maagi‎, 08-25-2013 02:38 PM
    anova, interaction variables
    • Replies: 2
    • Views: 2,549
    08-28-2013, 03:05 PM Go to last post
  53. Autoregressive distributed lag model (ADL)

    I have started to work with these to predict variables who's relationship may be changing over time (likely they are, but we don't know). I have...

    Started by noetsi‎, 08-26-2013 03:59 PM
    • Replies: 8
    • Views: 7,228
    08-27-2013, 10:14 PM Go to last post
  54. How to use LASSO with common shocks (economic factors)

    I am trying to use LASSO for variable selection, on a balanced panel. I have a total of 14 predictors, and would like to reduce this variable space....

    Started by mariamb‎, 08-27-2013 09:57 AM
    econometrics, finance, lasso, regression
    • Replies: 1
    • Views: 1,696
    08-27-2013, 10:01 AM Go to last post
  55. ROC curve for ordinal regression goodness-of-fit

    Hello everyone, I have a problem with the graphical output of a ROC curve I am calculating. I am sure it is very silly but I cannot figure out...

    Started by Neodyme‎, 08-22-2013 04:35 AM
    • Replies: 4
    • Views: 2,815
    08-26-2013, 03:11 AM Go to last post
  56. Ranges of Linear Regression data

    I have a linear regression of a symptom (fatigue) vs iodine that does not show much correlation but the fatigue max symptom at different intervals...

    Started by whimsica‎, 08-23-2013 04:22 PM
    ceiling, floor, max, min, regression
    • Replies: 5
    • Views: 2,853
    08-24-2013, 10:22 AM Go to last post
  57. Statistical methods for studying symptom vs drug level in single case study.

    What are most useful statistical methods for studying a single case study where an individual tracks for a few years symptom over time that varies up...

    Started by whimsica‎, 08-23-2013 04:09 PM
    biological, regression
    • Replies: 2
    • Views: 1,410
    08-23-2013, 09:25 PM Go to last post
  58. Quantifying differences

    Hello. I am comparing methods to trace the sources of sediment in rivers. Each method I try uses Monte Carlo uncertainty analysis to produce a...

    Started by sjp27‎, 08-22-2013 11:04 AM
    • Replies: 3
    • Views: 1,945
    08-22-2013, 02:21 PM Go to last post
  59. Test to apply for forecast results from a multivariate regression

    Hello everyone, My project is about the LIBOR rates (similar for the short term interest rates) It was known to be manipulated by Barclay's and...

    Started by TakashiD‎, 08-18-2013 04:18 PM
    • Replies: 1
    • Views: 1,424
    08-21-2013, 10:04 AM Go to last post
  60. Testing a scale with different weights

    Good afternoon, I am trying to test the precision of a scale using a gage R & R study. I have weighted four different weights 3 times each, in...

    Started by guilhermecruz‎, 08-14-2013 03:19 PM
    • Replies: 4
    • Views: 2,609
    08-20-2013, 08:47 AM Go to last post

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