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Forum: Applied Statistics

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

  1. 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, Yesterday 03:36 PM
    • Replies: 0
    • Views: 77
    Yesterday, 03:36 PM Go to last post
  2. 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: 215
    Yesterday, 11:21 AM Go to last post
  3. 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: 161
    09-01-2014, 07:47 AM Go to last post
  4. 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: 179
    08-30-2014, 02:40 AM Go to last post
  5. 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: 132
    08-27-2014, 06:53 AM Go to last post
  6. 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: 131
    08-26-2014, 04:54 AM Go to last post
  7. 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: 84
    08-26-2014, 12:01 AM Go to last post
  8. 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: 70
    08-25-2014, 06:19 PM Go to last post
  9. 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: 0
    • Views: 72
    08-25-2014, 07:30 AM Go to last post
  10. 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: 71
    08-24-2014, 04:56 PM Go to last post
  11. 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: 150
    08-23-2014, 04:32 AM Go to last post
  12. 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: 124
    08-20-2014, 03:45 PM Go to last post
  13. 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: 65
    08-20-2014, 12:25 PM Go to last post
  14. 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: 754
    08-19-2014, 09:14 AM Go to last post
  15. 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: 73
    08-18-2014, 01:33 PM Go to last post
  16. 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: 132
    08-11-2014, 10:20 PM Go to last post
  17. 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: 186
    08-08-2014, 06:04 PM Go to last post
  18. 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: 101
    08-08-2014, 07:51 AM Go to last post
  19. 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: 100
    08-08-2014, 02:25 AM Go to last post
  20. 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: 167
    08-06-2014, 02:07 AM Go to last post
  21. 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: 98
    08-05-2014, 07:40 AM Go to last post
  22. 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: 145
    08-04-2014, 11:00 AM Go to last post
  23. 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: 208
    08-04-2014, 12:25 AM Go to last post
  24. 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: 109
    08-01-2014, 11:50 AM Go to last post
  25. 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: 198
    07-31-2014, 10:30 AM Go to last post
  26. 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: 168
    07-29-2014, 12:56 AM Go to last post
  27. 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: 180
    07-28-2014, 09:21 AM Go to last post
  28. 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: 405
    07-28-2014, 03:06 AM Go to last post
  29. 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: 268
    07-26-2014, 09:09 AM Go to last post
  30. 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: 298
    07-25-2014, 01:32 AM Go to last post
  31. 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: 156
    07-24-2014, 06:59 PM Go to last post
  32. 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: 129
    07-23-2014, 05:04 PM Go to last post
  33. 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: 147
    07-22-2014, 10:31 AM Go to last post
  34. 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: 497
    07-21-2014, 02:29 PM Go to last post
  35. 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: 1,000
    07-21-2014, 12:33 PM Go to last post
  36. 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: 209
    07-17-2014, 08:21 PM Go to last post
  37. 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: 376
    07-15-2014, 11:34 AM Go to last post
  38. 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: 96
    07-12-2014, 06:53 PM Go to last post
  39. 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: 135
    07-11-2014, 10:15 AM Go to last post
  40. 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: 124
    07-10-2014, 12:15 AM Go to last post
  41. 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: 110
    07-09-2014, 12:57 PM Go to last post
  42. 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: 164
    07-08-2014, 08:18 AM Go to last post
  43. 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: 157
    07-08-2014, 04:44 AM Go to last post
  44. [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: 151
    07-07-2014, 09:55 AM Go to last post
  45. 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: 340
    07-04-2014, 01:09 PM Go to last post
  46. 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: 263
    06-28-2014, 02:01 PM Go to last post
  47. 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: 216
    06-28-2014, 07:08 AM Go to last post
  48. 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: 177
    06-26-2014, 09:01 AM Go to last post
  49. 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: 300
    06-22-2014, 12:40 PM Go to last post
  50. 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: 241
    06-22-2014, 10:36 AM Go to last post
  51. 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: 355
    06-21-2014, 10:24 AM Go to last post
  52. 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: 240
    06-20-2014, 11:04 AM Go to last post
  53. 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: 1,544
    06-19-2014, 11:52 AM Go to last post
  54. 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: 195
    06-19-2014, 03:19 AM Go to last post
  55. Regression with trend

    I ask this from time to time - still waiting for an answer:p When you use polynomial terms in a regression to deal with trends is this making the...

    Started by noetsi‎, 06-14-2014 01:38 PM
    • Replies: 4
    • Views: 284
    06-16-2014, 11:40 AM Go to last post
  56. Confidence interval for Difference in Probabilities (HELP:)

    Heehee, the 'help' worked - I got your attention, right. So, I ran a logistic regression (in SAS) with two binary categorical variables, their...

    Started by hlsmith‎, 06-12-2014 03:13 PM
    • Replies: 5
    • Views: 328
    06-13-2014, 03:08 PM Go to last post
  57. Combining Standard Deviations

    I have averages and standard deviations for production of 4 different factories on the same site by month. I need to size the rail car fleet. The...

    Started by MarkSzpila‎, 06-12-2014 10:33 AM
    • Replies: 2
    • Views: 259
    06-12-2014, 05:45 PM Go to last post
  58. Given Trendline Modify Distribution

    Hi, I'm given a trend line equation. I have a data distribution that I need to modify to fit as close as possible to this trend line. Is there...

    Started by nirvehex‎, 06-10-2014 08:19 PM
    • Replies: 0
    • Views: 284
    06-10-2014, 08:19 PM Go to last post
  59. Multiplicative Interaction (ordinal or disordinal)

    I have been trying to figure out ways to interpret an interaction. It is typically easy to do when you have a continuous and categorical variable in...

    Started by hlsmith‎, 06-06-2014 01:09 PM
    • Replies: 3
    • Views: 272
    06-09-2014, 10:36 AM Go to last post
  60. EFA and SEM

    Hi I am currently writing my master's thesis where I am working with questionnaire data. In that respect I have conducted exploratory factor...

    Started by Danfac‎, 06-07-2014 07:52 AM
    • Replies: 2
    • Views: 377
    06-09-2014, 03:13 AM Go to last post

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