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Forum: Applied Statistics

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

  1. Statistical procedure problem

    Hello. I recently entered the world of corporate data mining, and I'm a bit stumped with a request from my boss. I'm pretty well versed on a variety...

    Started by J.J.‎, Yesterday 03:45 PM
    • Replies: 0
    • Views: 100
    Yesterday, 03:45 PM Go to last post
  2. experiment results between workers in a laboratory - which test

    Hi all, (this is my first post) I need to compare the performances of technicians in the lab for a specific experiment. There is no defined or...

    Started by glacierst‎, 09-12-2014 04:15 AM
    • Replies: 1
    • Views: 135
    09-12-2014, 06:26 AM Go to last post
  3. Question Urgent Help needed regarding r1 Autocorrelation

    I'm searching from past 2 hours on the internet and I'm unable to find a solved example of calculating r1 first coefficient of correlation from the...

    Started by Dawood‎, 09-10-2014 03:48 PM
    autocorrelation, econometrics
    • Replies: 1
    • Views: 114
    09-10-2014, 08:10 PM Go to last post
  4. How to compare pre-post outcome when each subject react differently?

    I have 11 subjects with pre and post outcome (two repeated measures). I'd like to test the difference between both conditions. The problem is...

    Started by Themistocle‎, 09-07-2014 12:12 PM
    paired comparisons
    • Replies: 6
    • Views: 168
    09-10-2014, 03:09 PM Go to last post
  5. do we need to test for stationarity if not using autocorrelation?

    hi everyone, just a quick question. i know for time series, we need to test for stationarity before we can run ARIMA type models. what if i am just...

    Started by jimjohn‎, 09-07-2014 07:03 PM
    • Replies: 0
    • Views: 82
    09-07-2014, 07:03 PM Go to last post
  6. Weekly Event Probability in a time Range

    Hi All, I am a humble student Engineer/Software Developer that has not touched anything other than BAsic statistics. I have been given the task of...

    Started by JayCain‎, 09-05-2014 02:18 AM
    • Replies: 0
    • Views: 68
    09-05-2014, 02:18 AM Go to last post
  7. Smile MATLAB: Reshape nested structure and export it to Excel - Panel Data - Financial Time

    I am working with a nested structure with multiple fields, each field is a Nx1 vector (cell and double). {Ticker Date Open High Low Close Volume...

    Started by amazon‎, 08-25-2014 07:30 AM
    • Replies: 1
    • Views: 158
    09-04-2014, 11:43 AM Go to last post
  8. chow test in foreign direct investment analysis

    Hi fellows! I'm beginner in statistics so please forgive me in asking stupid questions :) What I'm trying to do is Chow test for Foreign Direct...

    Started by mysje_hood‎, 09-02-2014 03:36 PM
    • Replies: 0
    • Views: 142
    09-02-2014, 03:36 PM Go to last post
  9. Question Which test? - Significance of Sample Size

    Hi all, (First-time poster) I'm working with tagging data for 35 tracked fish. Each fish was tracked of 3 seasons, with detections (3873 overall)...

    Started by MMMCPC‎, 08-29-2014 04:08 PM
    biology, relevance, sample size, significance, test
    • Replies: 5
    • Views: 262
    09-02-2014, 11:21 AM Go to last post
  10. Compare a trial and control

    I want to be able to work out if the results of trials are significant. Assume I have the data for a control and a Trial. The number of samples in...

    Started by Mikezzz‎, 08-13-2014 06:09 AM
    • Replies: 1
    • Views: 179
    09-01-2014, 07:47 AM Go to last post
  11. cox proportional hazard question

    Usually if you have a categorical variable with more than two levels one level is not coded as a dummy (this is the reference level). In regression...

    Started by noetsi‎, 08-28-2014 10:55 AM
    • Replies: 6
    • Views: 199
    08-30-2014, 02:40 AM Go to last post
  12. Pasimonious Model for Neural Networks forecasting, I am really confusing.

    Hello People I recently studied Neural Networks forecasting and some interesting question arose while I am reading various articles on the net. ...

    Started by auto9817‎, 08-27-2014 06:53 AM
    • Replies: 0
    • Views: 150
    08-27-2014, 06:53 AM Go to last post
  13. B2B Sales revenue data and Time Series analysis

    Hello, I am a new member. I have a data set at work that includes quarterly revenue data over 3 consecutive years. Depending upon the product...

    Started by RWORR1‎, 08-25-2014 12:31 PM
    • Replies: 1
    • Views: 145
    08-26-2014, 04:54 AM Go to last post
  14. Sample Size For Marketing

    Lets say I put an ad up on a website and pay some amount every time someone views it. In order to make a profit I need 1/x (x varies so it can be...

    Started by xero007‎, 08-26-2014 12:01 AM
    • Replies: 0
    • Views: 96
    08-26-2014, 12:01 AM Go to last post
  15. Network Probability on a givien server

    There are 100 Clients. A Client will download a file for 30 seconds every 7 minutes (1/14th of the time they are downloading... conversely 13/14th of...

    Started by techsmarty‎, 08-25-2014 06:19 PM
    • Replies: 0
    • Views: 81
    08-25-2014, 06:19 PM Go to last post
  16. Passing from daily pds probability to annual probability

    Hello, I'm stuck on the next conversion or adjustment. I have the following problem, I'm using Weibull observational probability (order/(N+1) on my...

    Started by Jpalbae‎, 08-24-2014 04:56 PM
    annual period, daily, partial_duration_series
    • Replies: 0
    • Views: 80
    08-24-2014, 04:56 PM Go to last post
  17. Which analysis? Measured versus modeled

    Hello, I'm having trouble deciding which type of statistical analysis I should use to compare my modeled data to my measured data and was...

    Started by ddalluge‎, 08-20-2014 10:20 PM
    • Replies: 1
    • Views: 167
    08-23-2014, 04:32 AM Go to last post
  18. Cointegration in Non-linear time series

    I have the following problem: In*non-linear time series regression yt = g(xt)+et, if xt is non-stationary (i.e. I(1)) and yt is stationary (i.e....

    Started by nasazonova‎, 08-20-2014 03:45 PM
    non-linear, time series
    • Replies: 0
    • Views: 139
    08-20-2014, 03:45 PM Go to last post
  19. Treating multiple observations per object

    My data consists of thousands of machine elements, their price, as well as technical and non-technical attributes. Most of the data is categorical ...

    Started by John Dow‎, 08-20-2014 12:25 PM
    correlation, data mining, rattle, regression
    • Replies: 0
    • Views: 75
    08-20-2014, 12:25 PM Go to last post
  20. Non-parametric methods

    A book I am reading now on non-parametrics argues that t test may be still accurate in large sample sizes even if the distribution assumptions are...

    Started by noetsi‎, 07-28-2014 03:10 PM
    2 Pages
    1 2
    • Replies: 27
    • Views: 811
    08-19-2014, 09:14 AM Go to last post
  21. Overall Effect of CRM/Marketing programme

    I currently have a task at work which essentially requires me to estimate the annual value (in terms of revenue) of a client company's CRM/marketing...

    Started by MB30‎, 08-18-2014 01:33 PM
    • Replies: 0
    • Views: 90
    08-18-2014, 01:33 PM Go to last post
  22. Problem with Firth Logistic Regression

    Hello all, I am having some issues trouble shooting a Firth Logistic regression model I have run on municipal level data. So, I have a dataset on...

    Started by stdald15‎, 08-11-2014 10:20 PM
    • Replies: 0
    • Views: 148
    08-11-2014, 10:20 PM Go to last post
  23. Sports Ratings: Is it Possible to Rate Teams from Different Years?

    Hello, I am new to the forum, but I have taken statistics in college. I would like to apply an algorithm, so I can compare high school football...

    Started by hoosier122‎, 08-08-2014 06:04 PM
    • Replies: 0
    • Views: 199
    08-08-2014, 06:04 PM Go to last post
  24. Measuring Changes in Variable Relationship Over Time

    Hi, I am trying to monitor the relationship between two variables over time and detect when a signifcant change in the relationship between them...

    Started by tuathal‎, 08-08-2014 07:51 AM
    • Replies: 0
    • Views: 111
    08-08-2014, 07:51 AM Go to last post
  25. STATA - Survival Analysis

    Hello everyone, I am working on a dataset (IPOs) and trying to code those that fail and those that survive. Basically I am coding IPOs that...

    Started by lucas111‎, 08-08-2014 02:25 AM
    • Replies: 0
    • Views: 112
    08-08-2014, 02:25 AM Go to last post
  26. Talking STATA - Regression with decreasing sample + save t-statistics

    Hi all, I am working with the following data: stick year q diff_unemploy 2.03 1975 1 0.031 1.28 1976 1 -0.005 0.92 1977 1 -0.002...

    Started by amazon‎, 08-04-2014 12:10 AM
    stata regress save t-stat
    • Replies: 1
    • Views: 184
    08-06-2014, 02:07 AM Go to last post
  27. Bootstrapping residuals

    Hi! I am writing my master thesis in mutual funds in norway. in this I have to bootstrap some residuals according to the method of Kosowski et al...

    Started by neztirual‎, 08-05-2014 07:40 AM
    • Replies: 0
    • Views: 108
    08-05-2014, 07:40 AM Go to last post
  28. selecting reporting stat for Johansen Test for Cointegration

    All, I am running a Johansen test to test for co-integration and do not find an statistically significant result in either the max eigenvalue...

    Started by vikingo‎, 08-04-2014 08:58 AM
    cointegration, hqic, johansen test
    • Replies: 1
    • Views: 160
    08-04-2014, 11:00 AM Go to last post
  29. Acf Pacf interpretation for ARMA modeling

    Hi, I have trouble interpreting acf and pacf of the stationary series depicted. Could I receive some suggested interpretations, with focus on...

    Started by s0050506‎, 07-28-2014 03:23 PM
    • Replies: 6
    • Views: 229
    08-04-2014, 12:25 AM Go to last post
  30. Box Cox Transformation on time series

    Hi, I want to apply box cox transformation on my time series. I was just wondering can I apply the transformation on any time series or do i have...

    Started by s_chrodinger‎, 08-01-2014 11:50 AM
    box-cox, non-stationary, time series, transformation
    • Replies: 0
    • Views: 125
    08-01-2014, 11:50 AM Go to last post
  31. Time Series Analysis

    I have data that is spatial and temporal. Each data point at each time contains multiple signals of interest (some are spatially autocorrelated, some...

    Started by harry_‎, 07-31-2014 04:39 AM
    • Replies: 3
    • Views: 213
    07-31-2014, 10:30 AM Go to last post
  32. Justifying studying simulations

    Here I am talking about simulations such as monte carlo. I have often seen these used in statistical text/articles, for example to test an assumption...

    Started by noetsi‎, 07-28-2014 11:10 AM
    • Replies: 4
    • Views: 182
    07-29-2014, 12:56 AM Go to last post
  33. Handling Pearson's spurious correlation problem

    Hi all, I'm working on an analysis question for my organization. We recently introduced a new team of system analysts to augment the role the...

    Started by schwartzaw‎, 07-03-2014 07:07 AM
    • Replies: 2
    • Views: 199
    07-28-2014, 09:21 AM Go to last post
  34. After model selection: Estimated parameters are not reliable

    Hello, I have conducted an experiment which manipulated three factors (Factor 1: 3 levels, Factor 2: 2 levels, Factor 3: 2 levels). The response...

    Started by Scarlatti‎, 07-20-2014 06:27 PM
    • Replies: 13
    • Views: 422
    07-28-2014, 03:06 AM Go to last post
  35. Post Puzzled by Correlation

    This is a real problem although I'm using a made-up statistic (# of apples) for this. Say I am interested in how many apples people eat in a year....

    Started by idealliu‎, 07-21-2014 03:32 PM
    coefficient, correlation, matrix
    • Replies: 5
    • Views: 286
    07-26-2014, 09:09 AM Go to last post
  36. What is and is not a convenience sample

    It is well accepted that 'convenience samples" can not be used to make statistical inference, essentially because they are not a random sample of the...

    Started by noetsi‎, 07-24-2014 12:45 PM
    • Replies: 10
    • Views: 325
    07-25-2014, 01:32 AM Go to last post
  37. Average in semi dependent observations.

    I have a dataset of measurements (i.e., differences; which are continuous), with some individuals contributing a single measurement while others have...

    Started by hlsmith‎, 07-24-2014 09:12 AM
    • Replies: 4
    • Views: 168
    07-24-2014, 06:59 PM Go to last post
  38. How to assess impact over time

    I am looking at rehab rates (which are coded either successful or unsucessful)) and factors which influence them. This is a case where both the rehab...

    Started by noetsi‎, 07-23-2014 05:04 PM
    • Replies: 0
    • Views: 139
    07-23-2014, 05:04 PM Go to last post
  39. Adjusted Exponential Smoothing w a trend

    Hello, I am in need of help for my applied statistics class. I have read the book and looked on the internet for the help but I am still lost....

    Started by henrito0‎, 07-22-2014 07:45 AM
    • Replies: 1
    • Views: 157
    07-22-2014, 10:31 AM Go to last post
  40. Forecasting bus mileage - what is the best way

    We are trying to figure out when the engines on a specific bus will hit the mileage as designated per engine. I m having the darndest time trying to...

    Started by lehi52‎, 06-26-2014 03:55 PM
    2 Pages
    1 2
    • Replies: 18
    • Views: 510
    07-21-2014, 02:29 PM Go to last post
  41. Binary Logistic Regression: general issue and question about model fit

    Hello Guys, I would appreciate to have some feedback on an issue I am faced with. Thank you in advance for the time you will possibly spend in...

    Started by gianmarco‎, 07-10-2014 07:28 AM
    4 Pages
    1 2 3 ... 4
    • Replies: 45
    • Views: 1,027
    07-21-2014, 12:33 PM Go to last post
  42. Historical Unemployment Forecast Data. Where can I find it?

    Hi, I am trying to find Historical Unemployment Forecast data. Harder than expected. Anybody knows where to find that? I am also looking for...

    Started by amazon‎, 07-16-2014 09:37 PM
    unemployment forecast
    • Replies: 3
    • Views: 225
    07-17-2014, 08:21 PM Go to last post
  43. Ecologists & Sociologist views wanted: Species found together

    I am curious about some ecological statistics/scores. I believe that across times species of animals may migrate to different locations. This...

    Started by trinker‎, 07-11-2014 10:36 AM
    ecological statistics, sociolog
    • Replies: 12
    • Views: 389
    07-15-2014, 11:34 AM Go to last post
  44. League of Legends team-balancing project

    Okay, I just spent about two hours carefully typing up a post. And then it got nuked on submission due to a login error. I kind of want to curl up...

    Started by CupcakeTrap‎, 06-27-2014 09:01 PM
    • Replies: 1
    • Views: 107
    07-12-2014, 06:53 PM Go to last post
  45. Is a team member pulling their weight as far as work is concerned?

    Hi all, This is my first post on this forum, so I hope I've put this in the right section. I'm building an Access database at work which stores...

    Started by Darren Bartrup‎, 07-11-2014 10:15 AM
    • Replies: 0
    • Views: 144
    07-11-2014, 10:15 AM Go to last post
  46. Smile Stata - Finance - Quarterly Rebalancing Portfolio

    Hi all, I would like to achieve the following with STATA: I have about 8 years daily stock returns that I would like to transform to cumulative...

    Started by amazon‎, 07-10-2014 12:15 AM
    stata rebalancing
    • Replies: 0
    • Views: 134
    07-10-2014, 12:15 AM Go to last post
  47. Optimization problem - I need a flat floor!

    Okay, so my concrete floor is not level - there are high spots and there are low spots. My goal is to achieve <1/8th inch difference between any two...

    Started by ayo jay jo‎, 07-09-2014 12:57 PM
    applied, optimization, regression, spatial, topography
    • Replies: 0
    • Views: 120
    07-09-2014, 12:57 PM Go to last post
  48. Portfolio Correlation from a Correlation or Covariance Matrix

    What I have: 1. Correlation matrix of assets 2. Weights of assets for various portfolios 3. Standalone standard deviation of assets 4. Also...

    Started by Theimmortal1‎, 07-07-2014 09:23 AM
    • Replies: 1
    • Views: 175
    07-08-2014, 08:18 AM Go to last post
  49. Predicting the missing data of population growth (time series)

    Hi all, I have 2 vectors of rural and urban populations of the same country. (years from 1975 to 2020) with only three values (1980, 1990 and 2001...

    Started by ZygisM‎, 07-08-2014 04:44 AM
    • Replies: 0
    • Views: 168
    07-08-2014, 04:44 AM Go to last post
  50. [Econometrics] OLS when intercept is 0

    Hi, I'm studying with the book "Introductory Econometrics, A Modern Approach" (Wooldridge, 5th edition) and I am stuck at the problem 8 from...

    Started by Error404pnf‎, 07-07-2014 09:55 AM
    • Replies: 0
    • Views: 163
    07-07-2014, 09:55 AM Go to last post
  51. Smile Question regarding the suitability of PCA -> Cluster Analysis approach

    Hello - I have come across an obstacle during some of the data analysis for my dissertation. I'm not in the statistics field, though understand...

    Started by treebark‎, 06-13-2014 07:43 AM
    • Replies: 4
    • Views: 353
    07-04-2014, 01:09 PM Go to last post
  52. Principal Component Analysis on Time Series Data

    Hi, I have carried out experiments on a multivariate system (cell growth) where I have varied one factor at 5 levels and measured a number of...

    Started by whatyapapasay‎, 06-28-2014 02:01 PM
    • Replies: 0
    • Views: 279
    06-28-2014, 02:01 PM Go to last post
  53. specify correct random effects

    Hi all, I have a CRD with 4 reps and 4 treatments (A, B, C, D). The study took place in 1 location for 3 years. I want to pool over years (so...

    Started by szm‎, 06-28-2014 07:08 AM
    analysis, random effect
    • Replies: 0
    • Views: 227
    06-28-2014, 07:08 AM Go to last post
  54. Constructing value weighted industry portfolios

    I want to construct value weighted industry portfolios and I am confused on how to do it. I want to construct my industry portfolio as french did on...

    Started by Tosync‎, 06-26-2014 09:01 AM
    • Replies: 0
    • Views: 187
    06-26-2014, 09:01 AM Go to last post
  55. Recommended books/resources for Campaign analytics

    Hi all! Could anybody please recommend any books, or other resources, from which I can learn Campaign analytics? I have gotten some hold of the...

    Started by info_seekeR‎, 06-22-2014 12:40 PM
    campaign analysis, marketing, marketing research, statistics
    • Replies: 0
    • Views: 314
    06-22-2014, 12:40 PM Go to last post
  56. Estimating 1 cointegrating relationship when trace test indicates rank=2

    I am estimating a VECM for several countries. For one country in particular (call it country X), the Johansen trace test suggests that there are two...

    Started by CLP_PS‎, 06-22-2014 10:36 AM
    • Replies: 0
    • Views: 252
    06-22-2014, 10:36 AM Go to last post
  57. Simple question concerning life expentancy

    First English is my second language. I have a friend who was about 35 years old in 1974, I would like to know the probability of him being alive...

    Started by Soren882‎, 06-19-2014 08:02 PM
    • Replies: 1
    • Views: 363
    06-21-2014, 10:24 AM Go to last post
  58. Guidance appreciated: Multinomial mixed data types population characterization

    Guidance appreciated: I have approx 40k records from about 50 colleges. Data is FERPA-compliant one student per record, with age (integer), gender,...

    Started by cassio2506‎, 06-20-2014 11:04 AM
    multinomial, simulation
    • Replies: 0
    • Views: 252
    06-20-2014, 11:04 AM Go to last post
  59. European Social Survey -- income variable

    If you have worked with the ESS and are familiar with the vagaries of the income variable, perhaps you can help me identify a solution to a specific...

    Started by dbartram‎, 06-20-2013 10:45 AM
    • Replies: 9
    • Views: 1,580
    06-19-2014, 11:52 AM Go to last post
  60. Poisson regression on the means of count data

    Hi Talkstats, I have a question I hope you can help me with. I just finished a small research project about hummingbirds and the effect of...

    Started by pedter‎, 06-19-2014 03:19 AM
    • Replies: 0
    • Views: 208
    06-19-2014, 03:19 AM Go to last post

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