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Forum: Applied Statistics

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

  1. 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 05:38 AM
    • Replies: 0
    • Views: 81
    10-22-2016, 05:38 AM Go to last post
  2. 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 07:39 PM
    • Replies: 1
    • Views: 109
    10-21-2016, 07:57 PM Go to last post
  3. 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 07:57 AM
    • Replies: 1
    • Views: 96
    10-21-2016, 07:55 PM Go to last post
  4. 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 02:00 PM
    • Replies: 4
    • Views: 162
    10-20-2016, 05:53 AM Go to last post
  5. 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 08:44 PM
    data manipulation, longitudinal analysis, measuring time
    • Replies: 1
    • Views: 135
    10-16-2016, 02:43 AM Go to last post
  6. 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 09:31 AM
    • Replies: 1
    • Views: 136
    10-15-2016, 11:26 PM Go to last post
  7. 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 09:34 PM
    hypothesis testing, z-score, z-test
    • Replies: 2
    • Views: 148
    10-15-2016, 08:38 PM Go to last post
  8. 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 12:29 PM
    • Replies: 1
    • Views: 100
    10-12-2016, 01:11 PM Go to last post
  9. 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 12:47 PM
    anova, variance
    • Replies: 0
    • Views: 80
    10-12-2016, 12:47 PM Go to last post
  10. 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 05:16 AM
    constraints, non-linear program
    • Replies: 0
    • Views: 84
    10-11-2016, 05:16 AM Go to last post
  11. 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 02:55 PM
    2 Pages
    1 2
    • Replies: 27
    • Views: 746
    10-05-2016, 08:57 AM Go to last post
  12. 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 03:36 AM
    applied statistics, machine learning, mathematical statistics, ranking
    • Replies: 1
    • Views: 430
    10-04-2016, 02:43 PM Go to last post
  13. 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 10:36 AM
    • Replies: 0
    • Views: 121
    10-03-2016, 10:36 AM Go to last post
  14. 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 04:12 AM
    • Replies: 0
    • Views: 90
    09-29-2016, 04:12 AM Go to last post
  15. 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 02:32 PM
    causality, garch, granger, variance testing
    • Replies: 0
    • Views: 205
    09-23-2016, 02:32 PM Go to last post
  16. 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 11:18 AM
    anova, engineering, post-hoc, practical, research
    • Replies: 0
    • Views: 162
    09-21-2016, 11:18 AM Go to last post
  17. 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 08:36 AM
    • Replies: 1
    • Views: 324
    09-10-2016, 10:58 AM Go to last post
  18. 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 08:56 AM
    • Replies: 2
    • Views: 254
    09-08-2016, 07:21 PM Go to last post
  19. 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 04:26 PM
    • Replies: 0
    • Views: 162
    09-07-2016, 04:26 PM Go to last post
  20. 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 01:29 PM
    • Replies: 1
    • Views: 157
    09-06-2016, 04:01 PM Go to last post
  21. 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 11:54 AM
    correlated simulation, monte carlo
    • Replies: 4
    • Views: 399
    09-04-2016, 12:03 PM Go to last post
  22. 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 03:09 AM
    • Replies: 0
    • Views: 175
    09-02-2016, 03:09 AM Go to last post
  23. 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 04:03 PM
    education, statistics, t-test
    • Replies: 3
    • Views: 373
    08-31-2016, 08:58 PM Go to last post
  24. 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 09:36 AM
    • Replies: 0
    • Views: 131
    08-31-2016, 09:36 AM Go to last post
  25. 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 05:47 AM
    • Replies: 13
    • Views: 513
    08-27-2016, 02:03 PM Go to last post
  26. 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 10:07 AM
    anova, factor analysis, statistical methods, statistical test, variability
    • Replies: 3
    • Views: 304
    08-15-2016, 07:36 AM Go to last post
  27. 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. Iím trying to figure out a way to...

    Started by skiermike‎, 08-10-2016 10:12 AM
    • Replies: 1
    • Views: 298
    08-10-2016, 06:33 PM Go to last post
  28. 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 12:11 PM
    demand, forecasting, regression, seasonality
    • Replies: 4
    • Views: 332
    08-08-2016, 09:20 PM Go to last post
  29. 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 03:10 PM
    • Replies: 2
    • Views: 300
    08-07-2016, 02:08 AM Go to last post
  30. 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 10:38 AM
    • Replies: 3
    • Views: 275
    08-06-2016, 04:50 PM Go to last post
  31. 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 01:12 AM
    • Replies: 0
    • Views: 196
    08-04-2016, 01:12 AM Go to last post
  32. 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 10:49 AM
    matlab, repeated measures anova, unbalanced data
    • Replies: 6
    • Views: 338
    08-03-2016, 06:11 AM Go to last post
  33. 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 06:35 PM
    • Replies: 0
    • Views: 193
    08-02-2016, 06:35 PM Go to last post
  34. 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 11:45 AM
    • Replies: 2
    • Views: 178
    08-02-2016, 06:26 PM Go to last post
  35. 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 01:55 PM
    log, log transformation
    • Replies: 1
    • Views: 255
    07-29-2016, 04:36 PM Go to last post
  36. 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 08:25 AM
    • Replies: 6
    • Views: 655
    07-25-2016, 01:14 PM Go to last post
  37. 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 04:17 AM
    • Replies: 0
    • Views: 358
    07-19-2016, 04:17 AM Go to last post
  38. 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 04:58 PM
    classification, financial data, linear regression
    • Replies: 0
    • Views: 266
    07-17-2016, 04:58 PM Go to last post
  39. 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 09:11 AM
    • Replies: 1
    • Views: 172
    07-12-2016, 09:34 AM Go to last post
  40. 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 11:34 AM
    • Replies: 2
    • Views: 189
    07-11-2016, 05:23 PM Go to last post
  41. 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 10:49 AM
    • Replies: 3
    • Views: 201
    07-11-2016, 01:46 PM Go to last post
  42. 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 07:53 AM
    anova, anova observations, mean difference
    • Replies: 4
    • Views: 366
    07-08-2016, 09:11 AM Go to last post
  43. 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 06:24 AM
    experiment design, hypothesis testing, statistical test
    • Replies: 0
    • Views: 189
    07-08-2016, 06:24 AM Go to last post
  44. 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 11:40 AM
    • Replies: 1
    • Views: 421
    07-01-2016, 05:12 PM Go to last post
  45. 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 04:54 AM
    • Replies: 1
    • Views: 233
    07-01-2016, 10:44 AM Go to last post
  46. 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 08:16 AM
    average, formula, task, weight, work
    • Replies: 0
    • Views: 194
    07-01-2016, 08:16 AM Go to last post
  47. Comment on forecasting versus causal interpretation

    I don't think the mean causality in the classical sense, but simply the slope. I found this comment in an econometric text fascinating and since...

    Started by noetsi‎, 06-30-2016 11:35 AM
    • Replies: 1
    • Views: 256
    06-30-2016, 01:42 PM Go to last post
  48. Overall impact of a categorical variable.

    I have a categorical (nominal) variable with 7 levels. I created six dummy variables and can show their slopes in linear regression. But the division...

    Started by noetsi‎, 06-25-2016 02:59 PM
    • Replies: 4
    • Views: 402
    06-25-2016, 04:29 PM Go to last post
  49. Corporate Finance - Growth, ratios log transformations

    Hello all, Apologies in advance for the long post, and let me know if im violating any forum rule. Iím trying to expand Erik Staffordís(2015)...

    Started by kikolinner‎, 06-25-2016 08:45 AM
    • Replies: 0
    • Views: 199
    06-25-2016, 08:45 AM Go to last post
  50. differencing and the definition of the dv

    When you difference a series in ARIMA you are changing the definition of the series - something I had not thought of before today. So if for example...

    Started by noetsi‎, 06-23-2016 11:45 AM
    • Replies: 3
    • Views: 316
    06-23-2016, 02:57 PM Go to last post
  51. order of MA or AR in ARIMA

    When you speak of a AR or MA 2 are you saying that yt is being influenced by something that occurred at t-2 (two lags ago) or at t-1 and t-2...

    Started by noetsi‎, 06-17-2016 12:45 PM
    • Replies: 4
    • Views: 394
    06-22-2016, 03:18 PM Go to last post
  52. Choosing lags for ARDL models

    ARDL models have lags of Y and predictors. However, there rarely is enough theory to chose the correct number of each. Given that one author...

    Started by noetsi‎, 06-21-2016 03:26 PM
    • Replies: 0
    • Views: 230
    06-21-2016, 03:26 PM Go to last post
  53. Due-To Analysis in a Multiplicative Function

    Hi Everybody, I have built a linear regression model to explain sales based on different variables (sales, temperature, etc). The model is a...

    Started by ncreixent1‎, 06-21-2016 01:39 PM
    • Replies: 0
    • Views: 183
    06-21-2016, 01:39 PM Go to last post
  54. Parameter finding - can you give me a basic guide?

    Hey there, I started working with a detector, and I was asked to model the efficiency of this it. I have collected lots of data about the...

    Started by AdamHunyadi‎, 06-21-2016 05:38 AM
    datasets, parameter estimation, simulation
    • Replies: 2
    • Views: 233
    06-21-2016, 09:30 AM Go to last post
  55. forecasting sales

    Suppose I have a car insurance sales data broken down by week. In my case, I have 45 weeks of data. Sales range from 22 to 60 per week. I purposely...

    Started by semidevil‎, 05-26-2016 04:32 PM
    • Replies: 10
    • Views: 845
    06-20-2016, 05:12 PM Go to last post
  56. Trend analysis - problem with differing sets of years for financial date

    Hi, I am working with financial data from the American Hospital Association that spans 4 years each for hospitals in the list. I want to do a trend...

    Started by Laide‎, 06-19-2016 01:12 AM
    • Replies: 2
    • Views: 276
    06-20-2016, 03:03 AM Go to last post
  57. Learning analytics

    Hi all. I am a newbie to data analysis. I am an online learning facilitator for an online seminar-based program for local high school students. Since...

    Started by protonald‎, 05-23-2016 02:55 AM
    data analysis, learning analytics
    • Replies: 2
    • Views: 328
    06-17-2016, 01:43 AM Go to last post
  58. Time series bias

    Its noted that autocorrelation does not bias the slopes just effect the results. But spurious regression tied to non-stationarity/trend where the...

    Started by noetsi‎, 05-28-2016 04:21 PM
    • Replies: 2
    • Views: 287
    06-16-2016, 02:24 PM Go to last post
  59. Design Issue?

    I am working with a sample of ~500 people. There are 11 variables of interest. The first 10 (X1-X10) variables are binary and the eleventh (X11) is...

    Started by hlsmith‎, 06-15-2016 02:39 PM
    • Replies: 0
    • Views: 204
    06-15-2016, 02:39 PM Go to last post
  60. Types of Non-stationarity

    the literature says you need to know the type of non-Stationarity you are dealing with. How do you do this, how do you know if its trend or...

    Started by noetsi‎, 06-11-2016 03:21 PM
    • Replies: 1
    • Views: 322
    06-13-2016, 04:14 PM Go to last post

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