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Forum: Applied Statistics

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

  1. "Unknown Factor" needed

    Good Day All I am currently handling a temperature estimation project related to drop of temperature for different type of liquid in storage...

    Started by sandeepbwes‎, 11-14-2013 01:50 AM
    • Replies: 1
    • Views: 1,232
    11-14-2013, 07:55 AM Go to last post
  2. "which file should be deleted ?" using statistics theory

    Hi, Let's say I'm a poor disk provider. I allow people to upload and remote access to files on my computer. Since I'm poor I don't have budget to...

    Started by statbz‎, 10-27-2011 04:55 AM
    statistical test
    • Replies: 3
    • Views: 2,952
    10-28-2011, 11:32 AM Go to last post
  3. 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: 1,637
    10-19-2013, 11:21 AM Go to last post
  4. Lightbulb 1-way or 2-way ANOVA for an experiment using 2 lab machines

    Hi I have a data set of experimental data comparing 3 different loads on idendital bars - 1-way ANONA ? I also wish to compare this data with...

    Started by jarvis‎, 02-29-2012 09:18 AM
    • Replies: 0
    • Views: 1,928
    02-29-2012, 09:18 AM Go to last post
  5. 2 sample T-test acceptable here?

    I have before and after data from 4 stations (a,b,c,d). The data were collected monthly for 30 months before and for only 14 months after the...

    Started by markT‎, 12-03-2010 01:34 PM
    • Replies: 1
    • Views: 4,652
    12-03-2010, 05:17 PM Go to last post
  6. 2 Way ANOVA or multiple t tests with correction?

    Hi all, I am trying to do some data analysis, and I'm not sure whether to use a 2 way ANOVA or multiple t tests with Bonferroni correction. I...

    Started by jfar18‎, 07-10-2017 05:37 PM
    experiment analysis, factorial anova, multiple comparisons, t test, two factor anova
    • Replies: 4
    • Views: 1,329
    07-12-2017, 02:24 PM Go to last post
  7. 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: 2,135
    09-02-2016, 03:09 AM Go to last post
  8. 2-D scatterplot question...how to assign a single numerical value to each data point

    Greetings, I am building and looking at scatterplots comparing two different sets of data. I would like to be able to compare the data using a...

    Started by SBF12345‎, 04-20-2017 05:46 PM
    • Replies: 0
    • Views: 849
    04-20-2017, 05:46 PM Go to last post
  9. Question 2-WAY ANOVA - with only means, SD & sample size

    Hello all. I hope this is the correct forum for this query - my apologies if best placed elsewhere. As part of my doctoral research I'm looking to...

    Started by chrisjames511‎, 05-21-2012 12:03 PM
    • Replies: 3
    • Views: 10,547
    05-22-2012, 04:30 AM Go to last post
  10. 2-way4X3 Factorial ANOVA--does this require repeated measures for correlated errors ?

    I am comparing different methods of estimating water use from irrigated land. I have 2 factors: Irrigation Type (a,b,c,d--these are irrigation...

    Started by hydrogeologist1‎, 06-05-2017 12:22 PM
    anova, correlated errors
    • Replies: 0
    • Views: 341
    06-05-2017, 12:22 PM Go to last post
  11. 20 independent variables, 1 dependent variable.Which variables explain variance best?

    Hello, I have 20 different scales of independent items (psychological variables, Big 5, beliefs, attitudes, cognitive abilities, all metric) ...

    Started by Deus_Ex_Machina‎, 08-01-2017 06:56 PM
    • Replies: 0
    • Views: 193
    08-01-2017, 06:56 PM Go to last post
  12. A criterion for rejecting errors in air monitoring data

    Hello everybody, I have a set of air monitoring data from some dozens of monitoring stations. The measurements were for 7 air pollutants, every 5...

    Started by David2012‎, 11-15-2012 09:35 AM
    • Replies: 2
    • Views: 1,950
    07-12-2013, 09:00 AM Go to last post
  13. A hard read but worth it

    The Power of Logical Thinking by Vos Savant. Even the answers are hard.

    Started by Outlier‎, 10-16-2011 02:49 PM
    • Replies: 0
    • Views: 2,088
    10-16-2011, 02:49 PM Go to last post
  14. A help in my thesis

    I am currently constructing a thesis to comply with my requirements in my BSA program. My thesis is about comparing two groups of similar...

    Started by tan2x‎, 02-24-2011 08:47 AM
    • Replies: 0
    • Views: 2,484
    02-24-2011, 08:47 AM Go to last post
  15. A proper statistical test needed!

    Dear my friends, I am a computer science student, and I have a set of data. My data is divided in two groups (size of each group: n1=3928 and...

    Started by hamid_mirisaee‎, 06-26-2010 03:18 AM
    • Replies: 1
    • Views: 3,641
    06-26-2010, 09:51 AM Go to last post
  16. A Question about Econometrics

    Suppose we estimate the following model:( y) ̂= .78t, where t is the time variable (t=1, 2, , T). Suppose we calculate the residuals, res, and then...

    Started by askhwhelp‎, 11-16-2013 10:49 PM
    • Replies: 1
    • Views: 1,421
    11-17-2013, 12:47 PM Go to last post
  17. A textbook of Time Series Analysis

    I obtained a Bachelor Degree in Statistics in 1988. I was separated form this profession for more than 17 years because I was exercising Information...

    Started by davidbinyam‎, 05-13-2008 10:41 PM
    • Replies: 8
    • Views: 9,168
    05-16-2008, 02:58 PM Go to last post
  18. A time-variant dummy in a panel data model?

    Okay, I've got a model of the form: \displaystyle y_{i,t} = \beta_0 + \beta_1 \ D_{i,t} + Xb + \epsilon_{i,t} Where \displaystyle D_{i,t} = 1...

    Started by eBopBob‎, 03-22-2012 04:43 PM
    • Replies: 0
    • Views: 3,883
    03-22-2012, 04:43 PM Go to last post
  19. A/B/C Conversion Optimisation

    Hi All, I'm trying to understand the process behind testing both A/B site changes for statistically significant increases in conversion rate, and...

    Started by samg86‎, 09-17-2014 02:29 AM
    a/b testing, binomial, optimisation, z-test
    • Replies: 0
    • Views: 1,049
    09-17-2014, 02:29 AM Go to last post
  20. Question AB Testing / testing for differences between 2 groups when # success > N

    Hi all, Thanks for reading this post. Hopefully you can help me out, your 2 cents is much appreciated My problem is the following: I am AB...

    Started by Rob J‎, 02-24-2014 04:46 PM
    • Replies: 3
    • Views: 1,408
    02-28-2014, 02:18 PM Go to last post
  21. absolute mean and std of signed error

    Hi, I'm using several infrared cameras to measure the motion of a robot travelling with a programmed velocity (ground truth). I obtained a...

    Started by novice1‎, 11-12-2013 01:51 AM
    • Replies: 3
    • Views: 2,157
    11-12-2013, 03:06 AM Go to last post
  22. Abstract

    Hye guys...I'm from Malaysia..Currently doing my assignment on research subject.. Can anyone help me by checking my grammar and perhaps to correct...

    Started by ryan88‎, 01-29-2011 09:38 AM
    • Replies: 2
    • Views: 2,650
    01-29-2011, 10:21 PM Go to last post
  23. Accruracy

    Hello, I am not quite sure if the title is right or not but here it goes. I am doing an internship at a manufacturing facility where I am working in...

    Started by jimmy0ad‎, 07-02-2010 08:40 AM
    • Replies: 5
    • Views: 3,387
    07-14-2010, 06:58 PM Go to last post
  24. Accuracy and precision in 3D Compare Analysis

    Hi, We have utilized a new scanner that we want to evaluate. To be able to do this, we have used a reference scanner that is state of the art. ...

    Started by Mr.Blue‎, 12-01-2013 01:25 AM
    • Replies: 0
    • Views: 1,252
    12-01-2013, 01:25 AM Go to last post
  25. Accuracy calculation

    Hi all, This is probably basic stuff for some of them but it's the first time I come across this type of problem. I need to demonstrate that the...

    Started by mgubellini‎, 12-19-2016 12:12 PM
    • Replies: 2
    • Views: 3,637
    01-16-2017, 03:29 AM Go to last post
  26. Accuracy of a measurement device

    Good afternoon, I am working with a device that measures the internal dimensions of a piece. The device takes 27 different measurements, each one...

    Started by guilhermecruz‎, 08-02-2013 02:43 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 5,048
    08-07-2013, 07:45 PM Go to last post
  27. 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: 6,741
    08-04-2014, 12:25 AM Go to last post
  28. actual prices and two predictions -> ANOVA or MANOVA?

    Hello everybody, I'm unsure which stats to use for the following problem: I've got a list of prices for stocks of a certain date. In that list...

    Started by paul_b‎, 08-19-2012 01:09 PM
    anova, manova
    • Replies: 4
    • Views: 2,494
    08-27-2012, 01:58 AM Go to last post
  29. Adequate sample size determination, p-charts

    I am measuring defects vs. encounters of a software application in a healthcare setting, and during an analysis encountered 1 defect in 14000...

    Started by cinger‎, 09-28-2011 08:23 PM
    • Replies: 5
    • Views: 9,253
    10-05-2011, 08:04 PM Go to last post
  30. Adjusted Anderson-Darling

    Hi For my class students I wrote a few years ago the detailed proof of AD basic statistics test. Since a few months I try for my classroom...

    Started by isozv‎, 01-26-2013 08:04 AM
    • Replies: 0
    • Views: 1,915
    01-26-2013, 08:04 AM Go to last post
  31. 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: 1,109
    07-22-2014, 10:31 AM Go to last post
  32. Adjusted Residuals (Chi Square)

    Hello everyone, I'm looking at a group of international people that have participated in an online Dutch language course. In doing so, they were...

    Started by AThammawat‎, 06-03-2015 06:30 PM
    • Replies: 4
    • Views: 1,581
    06-04-2015, 04:52 AM Go to last post
  33. Adjusting for a covariate before discriminant analysis?

    Hello everyone, I'm new to this forum and I hope this is the right place to ask my questions. I'm trying to build a model to classify...

    Started by jeremiasg‎, 11-05-2010 08:38 AM
    • Replies: 3
    • Views: 5,860
    11-06-2010, 02:03 AM Go to last post
  34. 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: 3,515
    11-16-2016, 10:14 AM Go to last post
  35. advice for surveys on software tool and business administration

    Dear forum participants: I am designing a survey for a a simple software tool. The objective is that I need to assess its effectiveness, user...

    Started by parsec2011‎, 03-01-2014 04:25 AM
    business statistics
    • Replies: 0
    • Views: 1,089
    03-01-2014, 04:25 AM Go to last post
  36. Advice on comparative analysis between two groups on Likert scale questionnaire

    Hi everyone, I'm stuck on my dissertation which is due next week. I'm a business major student and my project is a comparative research on corporate...

    Started by Frankfoot‎, 06-02-2012 08:03 AM
    liker scale, likert interpretation, statistical analysis, statistical research
    • Replies: 0
    • Views: 2,703
    06-02-2012, 08:03 AM Go to last post
  37. Advice on sample frame and sample size

    I'm involved in a 4-yearwater supply, sanitation & hygiene project for mainly pastoralist (nomadic)communities in northern Kenya. We need to conduct...

    Started by andrewo-s‎, 02-09-2012 07:36 AM
    clustering, sample design, sample size
    • Replies: 1
    • Views: 1,832
    02-21-2012, 12:12 PM Go to last post
  38. Advice on work plan for statistical analysis

    I have a project that I have to submit a work plan for. We have a training program that we want to evaluate. Some employees have taken the program,...

    Started by dcroft‎, 01-26-2012 05:16 AM
    • Replies: 0
    • Views: 3,567
    01-26-2012, 05:16 AM Go to last post
  39. Advise on what analysis should be done

    I want to determine the effect of weekly promotions(basically the percentage increase in sales due to promotions) on different units in an...

    Started by Lan‎, 05-24-2012 02:39 AM
    • Replies: 0
    • Views: 2,013
    05-24-2012, 02:39 AM Go to last post
  40. 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: 2,404
    07-28-2014, 03:06 AM Go to last post
  41. After the results of Co-integration test

    Hi everyone I am facing the following problem. If any one know, please help me. I have 12 variables in one equation. Three are stationary at...

    Started by alim‎, 06-25-2012 09:13 AM
    • Replies: 0
    • Views: 1,607
    06-25-2012, 09:13 AM Go to last post
  42. Age-Adjusted Mortality Rates

    Okay, so I had originally been concerned with why my age-adjusted all-cause mortality rates differed from what the CDC's WONDER site provided. I...

    Started by bryangoodrich‎, 07-26-2011 01:38 PM
    • Replies: 3
    • Views: 7,404
    04-02-2012, 08:46 AM Go to last post
  43. Exclamation Aggregate Loss Model (Actuarial Science)

    Question: Let S be the random sum of N independent frequencies {{M_i}} where N is negative binomial distributed with r = 5 and \beta= 3 and {M_i}...

    Started by Asano‎, 02-25-2015 12:09 PM
    actuarial, aggregate, distribution, loss, science
    • Replies: 1
    • Views: 2,557
    02-25-2015, 02:31 PM Go to last post
  44. 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: 1,103
    07-11-2016, 05:23 PM Go to last post
  45. Question Aggregation of different variables

    Hi there ! I'm currently doing a regression and some of my explanatory variables are socio economic ones (revenue, number of children per...

    Started by RenaudM‎, 08-14-2015 06:32 AM
    • Replies: 1
    • Views: 1,202
    08-17-2015, 07:33 AM Go to last post
  46. AIC in time series

    I consider these comments in a well known text very confusing given what I thought was true with AIC. They are comparing two time series models. ...

    Started by noetsi‎, 06-12-2013 02:17 PM
    • Replies: 0
    • Views: 3,598
    06-12-2013, 02:17 PM Go to last post
  47. AIC to evaluate exponential smoothing

    Recently it has been recommeded to use information criteria such as AIC to evaluate ESM models. I am not sure if you use this for the historical...

    Started by noetsi‎, 02-13-2014 03:33 PM
    • Replies: 0
    • Views: 1,307
    02-13-2014, 03:33 PM Go to last post
  48. algorithm to generate multivariate, non-normal data with missing data patterns

    ok, so here is a more-detailed explanation of my question using an example. vinux and Dason (and everybody else) have been very kind in helping me...

    Started by spunky‎, 01-07-2014 03:01 PM
    • Replies: 1
    • Views: 3,065
    01-07-2014, 03:02 PM Go to last post
  49. all factor loadings negative?

    In explanatory factor analysis: what does it mean if all factor loadings on one particular factor are negative?

    Started by Wigoo‎, 08-04-2010 07:59 AM
    • Replies: 0
    • Views: 6,232
    08-04-2010, 07:59 AM Go to last post
  50. Almost Ideal Demand System Question

    Can I use prices which are consumer price indexes within the almost ideal demand system? thanks!

    Started by dannylimstata‎, 04-28-2012 10:20 PM
    • Replies: 1
    • Views: 2,175
    04-28-2012, 10:35 PM Go to last post
  51. Alpha and confidence intervals in business and other applied statistics

    As we all know, alpha is often set at 0.05 in science. This is mostly convention, but it's rather conservative since we'd rather slowly accumulate...

    Started by Junes‎, 06-20-2013 09:32 PM
    • Replies: 0
    • Views: 1,675
    06-20-2013, 09:32 PM Go to last post
  52. Am I doing factor analysis right?

    I haven't seen this yet in class, but I have watched a couple of youtube videos and wonder if I am doing this right. I have several items that...

    Started by Annvdb‎, 03-16-2014 01:30 AM
    • Replies: 1
    • Views: 1,486
    04-18-2014, 12:14 PM Go to last post
  53. American equivalent of Natrional Centre for Research Methods

    That is an excellent site, but where I work all foreign sites are blocked and I was hoping to find a US equivalent of it. It does a lot of work on...

    Started by noetsi‎, 04-15-2016 01:01 PM
    • Replies: 0
    • Views: 1,172
    04-15-2016, 01:01 PM Go to last post
  54. AMMI algorythm

    Hi, Does anyone has experience using AMMI (additive main effects and multiplicative interactions)? If yes, could you please provide practical...

    Started by szm‎, 06-09-2013 01:12 PM
    additive, interaction effects, multivariate analysis
    • Replies: 0
    • Views: 1,651
    06-09-2013, 01:12 PM Go to last post
  55. An average of standard deviations?

    Hello, My apologies if this isn't the correct forum for this, but I'm trying to analyze some data and can't figure out how to obtain an accurate...

    Started by indoze‎, 11-05-2010 08:53 PM
    2 Pages
    1 2
    • Replies: 26
    • Views: 211,293
    02-23-2017, 10:18 AM Go to last post
  56. Analyses on waiting times

    Dear all, I'm working on a survey conducted among customers of an accounting firm with different branches. Among many others, there was a...

    Started by ian‎, 08-06-2013 08:49 AM
    • Replies: 3
    • Views: 2,026
    08-15-2013, 11:59 AM Go to last post
  57. analysing the fiability of market shares study

    Hello everybody! I'm a beginner data analyst in the retail/CRM business. I have been asked about classifying the fiability of a study. The...

    Started by Mineral‎, 05-20-2010 12:56 PM
    • Replies: 4
    • Views: 3,360
    06-07-2010, 09:53 AM Go to last post
  58. Analysis for determining change in temperature

    Hi, I've got a process where a temperature reaches its final (unknown) value in about 120 min. What statistical analysis should I carry out on my...

    Started by Brettan‎, 12-01-2014 09:01 AM
    • Replies: 6
    • Views: 2,252
    12-05-2014, 01:36 AM Go to last post
  59. Analysis of data with weights

    I am conducting regression on data from a sample that used a stratified rather than simple random sampling. I know the regression is done differently...

    Started by noetsi‎, 04-06-2016 01:11 PM
    • Replies: 3
    • Views: 1,776
    04-07-2016, 04:06 PM Go to last post
  60. Analysis of nonnormal distributions for mobile gaming.

    Hello, all! I'm a newly minted UX Researcher at a mobile gaming company. I say "newly minted" because I've been in academia until very recently....

    Started by SamuraiUX‎, 04-18-2016 07:02 PM
    • Replies: 3
    • Views: 1,392
    04-19-2016, 03:35 PM Go to last post

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