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Forum: Applied Statistics

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

  1. Classification problem

    Hi, I just need a couple of pointers in the right direction. I have a water quality network of about 15 sites, of which we have three defined...

    Started by bugman‎, Today 01:10 AM
    • Replies: 0
    • Views: 10
    Today, 01:10 AM Go to last post
  2. Regression with different subsamples of countries

    I am trying to run a firm-level regression and am a bit confused with the results so I'd appreciate any comments. So the data is at the firm-year...

    Started by siaaia88‎, 11-30-2016 05:47 PM
    • Replies: 2
    • Views: 155
    12-03-2016, 05:08 PM Go to last post
  3. Cluster with unknown number of sampling units?

    I work on survey data which are usually collected through muti-stage cluster sampling. I am used to seeing clusters as geographically defined groups...

    Started by alexirani‎, 11-30-2016 07:36 AM
    • Replies: 0
    • Views: 84
    11-30-2016, 07:36 AM Go to last post
  4. How to quantify accuracy of responses to a question by multiple participants?

    I am a medical doctor working on a small project and needed statistical advice. My statistical background is very basic. The project purpose is to...

    Started by randomuser‎, 11-27-2016 02:46 AM
    • Replies: 0
    • Views: 117
    11-27-2016, 02:46 AM Go to last post
  5. Post [Financial Statistics] Having prob to answering question for forward price with bonds

    Consider a long forward contract on a 5 year bond which is currently traded at a price RM900.00. The delivery price is RM910.00, the time to...

    Started by Michael95‎, 11-24-2016 03:14 PM
    • Replies: 0
    • Views: 141
    11-24-2016, 03:14 PM Go to last post
  6. Interpreting interaction terms

    Hi, I did an experiment with three different treatment groups. In addition to finding out whether the treatments were statistically significant, I...

    Started by Wendero‎, 11-20-2016 03:21 PM
    • Replies: 3
    • Views: 202
    11-23-2016, 02:01 AM Go to last post
  7. Time series thread

    Once more I try to understand things that I have failed to understand for nearly a decade... :p I am trying to analyze data where an X occurs now...

    Started by noetsi‎, 11-18-2016 01:20 PM
    • Replies: 4
    • Views: 172
    11-18-2016, 10:58 PM Go to last post
  8. What do you do when you are not sure...

    I often get asked to run things where some assumption is violated . Or a Y variable has 9 distinct levels, so neither linear nor logistic regression...

    Started by noetsi‎, 11-18-2016 01:48 PM
    • Replies: 2
    • Views: 110
    11-18-2016, 03:17 PM Go to last post
  9. ARDL and Multilevel books

    I need a good book on autoregressive distributed lag (ARDL) and separately on multilevel regression. Ideally ones with some comments on how to run it...

    Started by noetsi‎, 11-18-2016 11:42 AM
    • Replies: 0
    • Views: 68
    11-18-2016, 11:42 AM Go to last post
  10. ADL-model with 0 lags

    Hello. We are doing a study with the Autoregressive Distrubuted Lag Model in Stata. Is it possible to get a model with 0 lags(ADL(0,0))? That is,...

    Started by DeltaY‎, 11-16-2016 04:48 AM
    • Replies: 1
    • Views: 206
    11-16-2016, 10:14 AM Go to last post
  11. Unhappy Simulating random samples that follow a particular distribution

    Hi, I am making a software that simulates evolution in a large population of fish and need help adding randomness to the process. Basically, in...

    Started by sosryet‎, 11-14-2016 07:04 PM
    • Replies: 1
    • Views: 147
    11-15-2016, 02:12 AM Go to last post
  12. Deciding by RMSE how many simulation results to use for a representative sample

    So, I'm doing a brute force Monte Carlo simulation to vary certain parameters and running a model through a thermal computational test bed. At the...

    Started by pythonprogrammer‎, 11-01-2016 05:48 PM
    representative, rms, rmse
    • Replies: 0
    • Views: 378
    11-01-2016, 05:48 PM Go to last post
  13. Question t test and data transformation

    Hi all, I hope this is the right place to post this question. We have two sets of data and we want to compare them. Both sets fail for normality...

    Started by mgubellini‎, 10-26-2016 04:20 AM
    • Replies: 9
    • Views: 420
    10-28-2016, 06:47 AM Go to last post
  14. Sampling Plan

    Hi everybody, this is Gias and this is my first post, I really hope you can help. Here's my question. In the company I work for, people carry...

    Started by Gias‎, 10-27-2016 04:13 AM
    sampling plan
    • Replies: 0
    • Views: 161
    10-27-2016, 04:13 AM Go to last post
  15. URL traffic

    Hi! I'm doing an piece of work which I need a bit of perspective on. I have been given two datasets; one containing 33,000'ish URLs and their...

    Started by alphonse2016‎, 10-22-2016 06:38 AM
    • Replies: 0
    • Views: 207
    10-22-2016, 06:38 AM Go to last post
  16. Loan equivalent to betting loses.

    A bet has a large probability p of winning small amounts of money M, and a low probability (1-p) of losing a large amount L>M .p/(p-1) So, the...

    Started by nuwopagog‎, 10-19-2016 08:39 PM
    • Replies: 1
    • Views: 161
    10-21-2016, 08:57 PM Go to last post
  17. Maximizing the probability of a user subsgribing given a price

    So, I was assigned the task outlined below and I have no idea on how to start. I'm a beginner so bear with me. We have a distribution that...

    Started by tophtop‎, 10-20-2016 08:57 AM
    • Replies: 1
    • Views: 288
    10-21-2016, 08:55 PM Go to last post
  18. Survey Assistance - how many top choices to pick

    In a survey of a closed, small and defined population (i.e. small business company), each is asked to choose the top x number from a list of 12...

    Started by Jane M‎, 10-17-2016 03:00 PM
    • Replies: 3
    • Views: 235
    10-17-2016, 05:08 PM Go to last post
  19. Measuring change over time- How to make measures from two datasets comparable?

    Greetings!!! I'm interested in learning how students' academic skills change overtime, to what extent, and how college contributes to this. ...

    Started by ricardo.l‎, 10-15-2016 09:44 PM
    data manipulation, longitudinal analysis, measuring time
    • Replies: 1
    • Views: 186
    10-16-2016, 03:43 AM Go to last post
  20. Test if a Trend is statistically Significant

    Hello, I am working with hospital data arranged in panel format over 4 years, something like this: ...

    Started by Laide‎, 10-11-2016 10:31 AM
    • Replies: 1
    • Views: 194
    10-16-2016, 12:26 AM Go to last post
  21. Unhappy Z Test with unknown sample size

    How would I conduct a z test when I don't have "n"? The instructor never went over what to do without an "n". It has always been provided. Please...

    Started by Psycmajor17‎, 10-12-2016 10:34 PM
    hypothesis testing, z-score, z-test
    • Replies: 2
    • Views: 212
    10-15-2016, 09:38 PM Go to last post
  22. F test for different Weigthed Least Squares adjustemnts

    Hello, I'like to check if variances from to differentes WLS adjustments arise from same population. Or maybe taken as equivalent. I use the F test...

    Started by tictac‎, 10-12-2016 01:29 PM
    • Replies: 1
    • Views: 148
    10-12-2016, 02:11 PM Go to last post
  23. Variance / Anova Questions

    I have readings taken at 20 different positions for 3 different treatments ( x 3 reps). The mean for each treatment is different. I am not interested...

    Started by confused slug‎, 10-12-2016 01:47 PM
    anova, variance
    • Replies: 0
    • Views: 130
    10-12-2016, 01:47 PM Go to last post
  24. Non-Linear programming :)

    Hi everyone So I am currently working on a non-linear model for my third year stats course & I need some help. I want to create a linking...

    Started by Juliana‎, 10-11-2016 06:16 AM
    constraints, non-linear program
    • Replies: 0
    • Views: 126
    10-11-2016, 06:16 AM Go to last post
  25. Missing data in regression

    I have an entire population. One of the variable is missing about 12 percent of the data. I believe this is because we have no finished collecting...

    Started by noetsi‎, 09-27-2016 03:55 PM
    2 Pages
    1 2
    • Replies: 27
    • Views: 871
    10-05-2016, 09:57 AM Go to last post
  26. mathematical model to build a ranking/ scoring system

    I want to rank a set of sellers. Each seller is defined by parameters var1,var2,var3,var4...var20. I want to score each of the sellers. Currently...

    Started by vij‎, 01-06-2016 04:36 AM
    applied statistics, machine learning, mathematical statistics, ranking
    • Replies: 1
    • Views: 480
    10-04-2016, 03:43 PM Go to last post
  27. Catastrohpe modeling and GLM

    Has anyone used Catastrophe (CAT) modeling results as a response variable in the GLM ? (1) Is this theoretically correct ? In the layman's terms,...

    Started by Choon‎, 10-03-2016 11:36 AM
    • Replies: 0
    • Views: 165
    10-03-2016, 11:36 AM Go to last post
  28. Question Concordance per juror in listening tests

    Hello, For the purpose of a university project I performed listening tests on a group of 10 jurors. They were evaluating the sounds with an A-B...

    Started by Amro‎, 09-29-2016 05:12 AM
    concordance
    • Replies: 0
    • Views: 129
    09-29-2016, 05:12 AM Go to last post
  29. Exclamation Causality test

    Do you know what is the "Hafner and Herwartz" causality-in-variance test, or else called LM-GARCH? And how you run it on eviews (or gretl)? If...

    Started by jamesb‎, 09-23-2016 03:32 PM
    causality, garch, granger, variance testing
    • Replies: 0
    • Views: 270
    09-23-2016, 03:32 PM Go to last post
  30. Question Engineering research tests: comparing post hoc data and paring

    Hello - I have several tests to do but my stats is a bit rusty... They are all based on the deflection of different beam designs: Test 1 Beam...

    Started by jarvis‎, 09-21-2016 12:18 PM
    anova, engineering, post-hoc, practical, research
    • Replies: 0
    • Views: 203
    09-21-2016, 12:18 PM Go to last post
  31. Help with non parametric analysis

    Hi, I'm about to write my master thesis and have some issues with analyzing my data. I have plants with different treatments and their...

    Started by dummy22‎, 09-10-2016 09:36 AM
    • Replies: 1
    • Views: 396
    09-10-2016, 11:58 AM Go to last post
  32. What statistical analysis (ordinal/nominal data)?

    Hi. I'm seriously super frightened by statistics but as a PhD student, I guess it's time to learn... I have data from a survey comparing three...

    Started by xfie‎, 09-07-2016 09:56 AM
    • Replies: 2
    • Views: 309
    09-08-2016, 08:21 PM Go to last post
  33. Please help! :)

    This is the same scenario as the monte carlo simulation question. Wind speed and temperature determine the number of seats sold for a flight. I'm...

    Started by Juliana‎, 09-07-2016 05:26 PM
    • Replies: 0
    • Views: 223
    09-07-2016, 05:26 PM Go to last post
  34. Simple average question

    This might be the most basic math question ever asked here :( I want to calculate a year to date (not monthly) average of cases per counselor. I...

    Started by noetsi‎, 09-06-2016 02:29 PM
    • Replies: 1
    • Views: 205
    09-06-2016, 05:01 PM Go to last post
  35. Red face Monte Carlo simulation

    Hi :) I'm currently doing a third year university stats course. I need help with some questions. The question gives Wind speed and Temperature...

    Started by Juliana‎, 09-03-2016 12:54 PM
    correlated simulation, monte carlo
    • Replies: 4
    • Views: 481
    09-04-2016, 01:03 PM Go to last post
  36. 2+ measures for one outcome possible?

    Hey guys, I am currently designing a study which aims to investigate the effect of a treatment on several outcomes. Since some of the outcomes are...

    Started by floriisco‎, 09-02-2016 04:09 AM
    • Replies: 0
    • Views: 217
    09-02-2016, 04:09 AM Go to last post
  37. Statistical Analysis of Student Test Scores before and after an Intervention

    Hello, Please help me ensure that I am conducting the proper statistical analysis. I am trying to determine if my student test score results are...

    Started by billturner3‎, 08-19-2016 05:03 PM
    education, statistics, t-test
    • Replies: 3
    • Views: 426
    08-31-2016, 09:58 PM Go to last post
  38. looking at how income fluctuations and instability affect spending in certain areas

    Hi, I am trying to figure out how to examine how the magnitude of a spike in funding affects spending in certain sectors. For example, an...

    Started by the42up‎, 08-31-2016 10:36 AM
    • Replies: 0
    • Views: 189
    08-31-2016, 10:36 AM Go to last post
  39. Question examine whether data sets come from the same ditribution

    hi, i want to check whether the two data sets can be drawn from the same distribution. can i do it with chi-square test? what are the assumptions i...

    Started by hagit‎, 08-23-2016 06:47 AM
    • Replies: 13
    • Views: 604
    08-27-2016, 03:03 PM Go to last post
  40. Seek for Statistical Test of Variability Contribution Percentage of Multiple Factors

    Hi, I need statistical test which would tell me which percent of variability in dependent variable is from given independent set of variables and...

    Started by Alexei Nomazov‎, 08-14-2016 11:07 AM
    anova, factor analysis, statistical methods, statistical test, variability
    • Replies: 3
    • Views: 351
    08-15-2016, 08:36 AM Go to last post
  41. Can you help me use statistics to understand inventory at my company??

    Hey everyone, I work for an industrial materials warehouse that stocks and sells probably 10,000 discreet items. Im trying to figure out a way to...

    Started by skiermike‎, 08-10-2016 11:12 AM
    • Replies: 1
    • Views: 347
    08-10-2016, 07:33 PM Go to last post
  42. Regression and seasonality

    I am running a multiple linear regression analysis to show how different demand factors affect demand of juice. My independent variables are price,...

    Started by statsgirl123‎, 08-08-2016 01:11 PM
    demand, forecasting, regression, seasonality
    • Replies: 4
    • Views: 403
    08-08-2016, 10:20 PM Go to last post
  43. Weighted moving averages

    I would like to learn about what I think are called weighted moving averages for some software I am working on. I need a way to estimate the...

    Started by Jennifer Murphy‎, 08-05-2016 04:10 PM
    • Replies: 2
    • Views: 348
    08-07-2016, 03:08 AM Go to last post
  44. Comparing Mean and Median

    Hi, This is my first post here so I am sorry if this question seems a little basic or I have put it in the wrong section of the forum. I was...

    Started by mc123‎, 08-06-2016 11:38 AM
    • Replies: 3
    • Views: 333
    08-06-2016, 05:50 PM Go to last post
  45. Time Series Problems

    Hello all, I need your advice regarding analysis I wish to perform. I have time series data, of a rate of some virtual stock. The time interval is...

    Started by Yankel‎, 08-04-2016 02:12 AM
    • Replies: 0
    • Views: 241
    08-04-2016, 02:12 AM Go to last post
  46. What ANOVA fits best?

    Dear all, can anyone please advice me which ANOVA is the most suitable: An athlete has perfromed multiple runs at constant speed with three...

    Started by Jurij‎, 08-02-2016 11:49 AM
    matlab, repeated measures anova, unbalanced data
    • Replies: 6
    • Views: 395
    08-03-2016, 07:11 AM Go to last post
  47. Breusch-Godfrey

    I am using the Breusch-Godfrey for autocorrelation, but I dont know how many lags should I use? I am testing seasonality of funds returns with...

    Started by DuarteR‎, 08-02-2016 07:35 PM
    econometrics
    • Replies: 0
    • Views: 233
    08-02-2016, 07:35 PM Go to last post
  48. Newey West autocorrelation

    May I use Newey West procedures when exists only autocorrelation? or I just can use Newey West when exists both autocorrelation and...

    Started by DuarteR‎, 08-02-2016 12:45 PM
    econometrics
    • Replies: 2
    • Views: 213
    08-02-2016, 07:26 PM Go to last post
  49. Log transformation of means

    Hey! I'm working on a meta-analysis and I want to use the means for moderator analysis. So some journal articles report log transformed values of...

    Started by Feal‎, 07-29-2016 02:55 PM
    log, log transformation
    • Replies: 1
    • Views: 302
    07-29-2016, 05:36 PM Go to last post
  50. Instrumental variables

    Instrumental variables must not be correlated with the error term. How can you test if they are? The only way I can think of is testing their...

    Started by noetsi‎, 07-12-2016 09:25 AM
    • Replies: 6
    • Views: 716
    07-25-2016, 02:14 PM Go to last post
  51. significance of the difference between two values

    Hello all, I'm working on a skew-normal distribution and would like to know if the difference between 2 values of the data set is significant. ...

    Started by nbenic23‎, 07-19-2016 05:17 AM
    • Replies: 0
    • Views: 399
    07-19-2016, 05:17 AM Go to last post
  52. Classification System based on Statistical tests

    Hello and Thanks I am looking at financial data (Revenue for Example) over a 5 year time frame and want to classify the data based on trends...

    Started by Stockcalc‎, 07-17-2016 05:58 PM
    classification, financial data, linear regression
    • Replies: 0
    • Views: 308
    07-17-2016, 05:58 PM Go to last post
  53. SDC Platinum Database

    Hello everyone, Currently I'm doing research on whether implementation of open innovation in high technology industries makes a firm more crisis...

    Started by Benelo‎, 07-12-2016 10:11 AM
    • Replies: 1
    • Views: 205
    07-12-2016, 10:34 AM Go to last post
  54. Aggregate versus individual data

    As context for this we are working on creating models that predict economic factors such as increased income as result of being in our programs....

    Started by noetsi‎, 07-11-2016 12:34 PM
    • Replies: 2
    • Views: 225
    07-11-2016, 06:23 PM Go to last post
  55. What does this regulation mean?

    I would appreciate comments on this new federal regulation. I have no idea what they mean (no other context is provided). The only...

    Started by noetsi‎, 07-11-2016 11:49 AM
    • Replies: 3
    • Views: 240
    07-11-2016, 02:46 PM Go to last post
  56. ANOVA for three different time periods

    I have three different time periods of sales data of 4 weeks apiece: weeks 1-4, 5-8, and 9-12. During weeks, 9-12 we attempted a test that may...

    Started by clovisjim‎, 07-08-2016 08:53 AM
    anova, anova observations, mean difference
    • Replies: 4
    • Views: 398
    07-08-2016, 10:11 AM Go to last post
  57. Statistical test for algorithm performance

    I am developing different algorithms for a class of optimization problems. I have several problem instances in this class (some from real...

    Started by stor‎, 07-08-2016 07:24 AM
    experiment design, hypothesis testing, statistical test
    • Replies: 0
    • Views: 224
    07-08-2016, 07:24 AM Go to last post
  58. eQualityCoin- What type of model is this?

    Hi everyone, I've been working on developing a crypto-currency called eQualityCoin for a while now and hoped someone here might be able to help me...

    Started by MPrestonSparks‎, 06-29-2016 12:40 PM
    • Replies: 1
    • Views: 461
    07-01-2016, 06:12 PM Go to last post
  59. Is a paired two sample for means t- test OK?

    I am performing some method validation and need to compare results but am unsure which t-test to use. I am thinking paired would be OK but would...

    Started by sporotite‎, 07-01-2016 05:54 AM
    • Replies: 1
    • Views: 275
    07-01-2016, 11:44 AM Go to last post
  60. Formula for prioritization

    Hey guys, I hope you are all doing well. I have a quick question related to an applied research I need to make for my job. Basically, we have a...

    Started by celeronhater‎, 07-01-2016 09:16 AM
    average, formula, task, weight, work
    • Replies: 0
    • Views: 229
    07-01-2016, 09:16 AM Go to last post

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