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Forum: Applied Statistics

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

  1. Inflation Targeting Excel

    Hi, For a economical class I'm following I need some help for an assignment. I'm totally lost. The assignment asks me to test if there is a...

    Started by diederikvanduuren‎, 11-25-2015 11:10 AM
    • Replies: 0
    • Views: 84
    11-25-2015, 11:10 AM Go to last post
  2. Two many outliers for Tukey boxplot?

    I calculated Tukey extreme outliers (in this case only for outliers at the top of the distribution). The calculation is upper quartile +(3*IQR). I...

    Started by noetsi‎, 11-10-2015 12:13 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 606
    11-19-2015, 05:22 PM Go to last post
  3. Moment generating function

    Please ignore, all sorted now

    Started by calypso‎, 11-17-2015 02:33 PM
    • Replies: 0
    • Views: 143
    11-17-2015, 02:33 PM Go to last post
  4. Comparing data sets with two very different samples sizes - stats newbie

    Hi, I realize this question might have been asked before, or is very rudimentary, but I'm having trouble figuring it out. I have several data sets...

    Started by JoeJackson‎, 11-17-2015 01:26 PM
    basic statistics, chi square, sample size disparity, welsch test
    • Replies: 0
    • Views: 115
    11-17-2015, 01:26 PM Go to last post
  5. Which Test to Prove/Disprove hypothesis...

    Hi, I'm new to this forum and I'm not entirely sure if this is the right subtopic to post my question on but I'm hoping someone can give me some...

    Started by feliciak‎, 11-13-2015 10:58 PM
    • Replies: 2
    • Views: 298
    11-14-2015, 08:28 PM Go to last post
  6. Demographic data and MANOVA

    I have a set of demographic data including countries categorised into 6 geographical regions and I want to see how these regions differ depending on...

    Started by o2222p‎, 11-13-2015 11:09 AM
    demographic, discriminant function, manova
    • Replies: 0
    • Views: 97
    11-13-2015, 11:09 AM Go to last post
  7. How to calculate?

    Hello, I would like to ask if anybody know how to calculate break even point of number of loans in peer to peer lending? How much (number of...

    Started by rogamen‎, 11-11-2015 07:06 AM
    diversfication, loan, loans, risk, spread
    • Replies: 0
    • Views: 161
    11-11-2015, 07:06 AM Go to last post
  8. Smile Proper statistical analysis for similarity of two paired datasets.

    Hi! I am an engineering student and as part of an undergraduate research, I created a device that measures a certain value. However, there is a...

    Started by renzbagaporo‎, 11-09-2015 05:53 PM
    • Replies: 2
    • Views: 195
    11-10-2015, 07:52 AM Go to last post
  9. Joint outliers - what is this really?

    We analyze the impact of cost and duration (time in service) outliers. I tried to improve the analysis two years ago by looking at outliers on both...

    Started by noetsi‎, 11-02-2015 04:09 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 508
    11-06-2015, 01:53 PM Go to last post
  10. Evaluation of a Factor developing within a population over time

    Hi, For an employee survey, we would like to have a monthly indicator on how several factors ( for example work related stress ) are developing. ...

    Started by Panda666‎, 11-06-2015 08:16 AM
    • Replies: 0
    • Views: 92
    11-06-2015, 08:16 AM Go to last post
  11. Unhappy vargha and Daleney A test ( to measure significance and direction)

    Hello As part of survey data. i conducting Mann whitney U test on ordinal data to identify the difference in ranking of dependent variable by...

    Started by salmasaima‎, 11-06-2015 03:27 AM
    applied statistics
    • Replies: 0
    • Views: 118
    11-06-2015, 03:27 AM Go to last post
  12. correct way to find error/uncertainty

    I have a set of 10 values of a physical quantity P which is defined as P=\sqrt{q^2+u^2} where q and u are themselves two different physical...

    Started by smp‎, 11-02-2015 04:53 AM
    • Replies: 0
    • Views: 142
    11-02-2015, 04:53 AM Go to last post
  13. Comparing which work units are more successful than others

    I have been given a project to determine which work units are more successful than others. My dependent variables are closing cases successfully, and...

    Started by noetsi‎, 10-29-2015 12:19 PM
    • Replies: 5
    • Views: 281
    10-30-2015, 05:11 PM Go to last post
  14. Time series and forecasting

    Which for me are the same thing. I have lots of questions, but at heart the most important. If you are running regression and both the DV and IV...

    Started by noetsi‎, 10-26-2015 01:31 PM
    • Replies: 3
    • Views: 356
    10-27-2015, 11:45 AM Go to last post
  15. Question Re-creating ranking table to allow scenario analysis

    Hi all, At work I have been asked to re-create a league table comparing employers, and build in the underlying scoring system so that we can...

    Started by Scoobing‎, 10-23-2015 04:19 AM
    • Replies: 0
    • Views: 273
    10-23-2015, 04:19 AM Go to last post
  16. Random variates and expected value

    Hi all. I have a spreadsheet with standard normally distributed random variates in one column. How do I find the expected value and variance based...

    Started by PERAV‎, 10-21-2015 05:33 AM
    • Replies: 2
    • Views: 235
    10-21-2015, 11:24 AM Go to last post
  17. Control Charts Help

    Hello All, I am newbie to control charts and wanted to get some clarification on building a control chart. I work in an IT Support team, and we...

    Started by Luffy128‎, 10-14-2015 01:34 PM
    • Replies: 3
    • Views: 303
    10-14-2015, 04:56 PM Go to last post
  18. NFL Week 6 regression predictions

    http://trevorbischoff.com/nfl-2015-week-6-predictions/ Atlanta 54% NY Jets 79% Pittsburgh 52% Minnesota 73% Buffalo 55% Detroit 84% Denver...

    Started by LeeBalto‎, 10-13-2015 08:28 AM
    logistic regression, prediction, regression
    • Replies: 0
    • Views: 248
    10-13-2015, 08:28 AM Go to last post
  19. Average spending per person.

    This should be simple, but its not. I have to know how many people we can release in a future year. To do that I need to know how much on average...

    Started by noetsi‎, 10-09-2015 01:51 PM
    • Replies: 3
    • Views: 280
    10-09-2015, 02:58 PM Go to last post
  20. Question Variance of mean with correlation between auto-correlated time series

    I have several time series of daily temperature measurements for the same period but different places. (More concrete, 9 places with data for 92 days...

    Started by nabla‎, 09-09-2015 06:39 AM
    • Replies: 1
    • Views: 428
    10-03-2015, 07:10 AM Go to last post
  21. statistics for number of cells per image

    greetings, I am trying to compare number of cells per image frame in a treated group and an untreated group. I created photo montages based on...

    Started by Nuland‎, 09-23-2015 05:14 PM
    • Replies: 1
    • Views: 301
    10-03-2015, 05:21 AM Go to last post
  22. missing data/multiple imputations

    They often talk about whether the mechanism that generates missing data is"ignorable." I don't really know what this means in practice. Also how do...

    Started by noetsi‎, 03-12-2015 02:40 PM
    8 Pages
    1 2 3 ... 8
    • Replies: 114
    • Views: 5,777
    09-30-2015, 02:09 PM Go to last post
  23. Data Driven Logistic Regression

    Hi everyone, I just wanted to share a real life usage of logistic regression that I like to monitor as data feeds into it. Plus he is comparing it...

    Started by LeeBalto‎, 09-22-2015 12:24 PM
    logistic regression
    • Replies: 4
    • Views: 358
    09-29-2015, 08:58 AM Go to last post
  24. MA() part of ARIMA: How do you get error terms?

    I've been through the excellent forecasting book coauthored by Hyndman on otext.org. I'm having trouble understanding the actual algorithm. The MA(x)...

    Started by jamesdvance‎, 09-21-2015 01:49 PM
    arima, forecasting
    • Replies: 7
    • Views: 575
    09-25-2015, 02:31 PM Go to last post
  25. Which control chart to use

    I am tracking spending by month going back about 5 years. It is obvious that the pattern changed dramatically in May 2015 and continued for at least...

    Started by noetsi‎, 09-24-2015 01:25 PM
    • Replies: 4
    • Views: 217
    09-24-2015, 02:34 PM Go to last post
  26. help making sense of two-tailed test

    Hello, there is no 'spatial statistic' section in this forum, but I do know that there are some 'spatial' guys around here, so I will post my...

    Started by gianmarco‎, 09-16-2015 07:49 AM
    • Replies: 2
    • Views: 374
    09-16-2015, 08:34 AM Go to last post
  27. Question Which type of time series to use?

    Hey, I have a data set which includes weekly/monthly sales and questions about customer satisfaction. I have already done EFA/CFA based on these...

    Started by purifyz‎, 08-27-2015 05:28 AM
    dfm, dynamic factor models, time series, time series analysis, time series regression
    • Replies: 6
    • Views: 623
    09-14-2015, 05:33 PM Go to last post
  28. Reoccuring patterns

    Hi, I am new to this forum and also not very firm in my statistics knowledge, so please forgive me any missing information or thinking errors. ...

    Started by wolfluk‎, 09-14-2015 07:41 AM
    • Replies: 0
    • Views: 167
    09-14-2015, 07:41 AM Go to last post
  29. Calculating a heat retention index for thermos bottles

    I have a couple of thermos bottles that I use for hot beverages at my desk. I like my drinks at about 135-145, so that's the range I am most...

    Started by Jennifer Murphy‎, 03-14-2015 02:09 AM
    • Replies: 5
    • Views: 767
    09-13-2015, 11:09 PM Go to last post
  30. conditional distribution functions.


    Started by wmjs2‎, 09-13-2015 01:58 AM
    conditional distribution, poisson
    • Replies: 0
    • Views: 614
    09-13-2015, 01:58 AM Go to last post
  31. Multivariate normality and sample size

    I see these type of comments a lot and I don't understand why they are correct (I know this has to do with tests that are asymptotically accurate).

    Started by noetsi‎, 08-21-2015 04:30 PM
    • Replies: 7
    • Views: 425
    09-11-2015, 08:43 PM Go to last post
  32. Determining outliers

    Dear folks, I am interested in statistics but I never had a course in college and I've had to learn a few basic things myself. This time, I am...

    Started by Moemanofnj‎, 09-10-2015 10:34 AM
    • Replies: 7
    • Views: 412
    09-10-2015, 01:37 PM Go to last post
  33. Standardizing the SD of two price series with different mean

    Hello, I have got two time series of stock prices. Usually the logarithmic returns (= first difference of logarithmic prices) are used to...

    Started by consuli‎, 08-28-2015 06:43 AM
    • Replies: 3
    • Views: 539
    09-05-2015, 01:53 PM Go to last post
  34. Egarch

    the real life interpretation of constant (omega) parameters in EGARCH model.

    Started by nonso‎, 09-04-2015 08:05 AM
    • Replies: 0
    • Views: 225
    09-04-2015, 08:05 AM Go to last post
  35. Calculating Population-weighted Atkinson index in Excel

    For my dissertation, I am calculating inequality on a worldwide level, between countries. In my calculations, I would like to give each country a...

    Started by eosdk‎, 08-30-2015 04:46 AM
    atkinson, excel, formula, inequality
    • Replies: 2
    • Views: 410
    08-30-2015, 06:07 PM Go to last post
  36. Combining queues

    So i am playing around with a serial queueing model. At the moment i have two independent M/M/1 queues, but with different parameters for the...

    Started by Prometheus‎, 08-27-2015 05:03 AM
    • Replies: 0
    • Views: 159
    08-27-2015, 05:03 AM Go to last post
  37. Cluster techniques for large datasets

    Hi all. I am looking for a topic of my master's dissertation. I had an initial discussion with my supervisor and we decided to analyze different...

    Started by Spyros13‎, 08-26-2015 01:28 PM
    • Replies: 6
    • Views: 330
    08-26-2015, 02:04 PM Go to last post
  38. How to divide standard deviation

    Hi, I am developing a model of vehicles traveling regular routes. Assume the length of the path (distance) from each stop to the next is known....

    Started by mattbrenner‎, 08-23-2015 11:56 AM
    standard deviation
    • Replies: 0
    • Views: 238
    08-23-2015, 11:56 AM Go to last post
  39. Determine sample size to get a statistically significant result

    Hello, this question concerns the topic of A/B split-testing. More about it on wiki here. I need to determine what is sample size would I require...

    Started by egordryagin‎, 08-19-2015 09:25 AM
    power calculation, probability, sample size, statistical significance
    • Replies: 1
    • Views: 352
    08-19-2015, 10:03 AM Go to last post
  40. Brownian motion around a sinusoid.

    I wish to model arrivals of people into a healthcare queue. The methods I have studied involve assuming that the arrival rate is constant - but the...

    Started by Prometheus‎, 07-25-2015 12:28 PM
    • Replies: 8
    • Views: 480
    08-18-2015, 03:05 PM Go to last post
  41. [SOLVED] NPV calculation

    I am not doing NPV in the normal sense. I have an existing cost. We generate a benefit that begins when the person leaves the system. We assume,...

    Started by noetsi‎, 08-18-2015 01:36 PM
    • Replies: 0
    • Views: 209
    08-18-2015, 01:36 PM Go to last post
  42. Nonparametic equivalent for RM 2way?

    Hi! I'm new here and at my company we do not have an easily accessible statistician so any help that you can provide would be greatly appreciated. ...

    Started by ligeia78‎, 08-17-2015 11:58 AM
    nonparametric rm?
    • Replies: 1
    • Views: 257
    08-18-2015, 03:09 AM Go to last post
  43. 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 07:32 AM
    • Replies: 1
    • Views: 205
    08-17-2015, 08:33 AM Go to last post
  44. Does this use of graphs create wrong answers.

    I am graphing 5 flows of spending over time (in excel, but I don't think that is pertinent to this issue). Because the axis ranges from 0 to 11...

    Started by noetsi‎, 08-08-2015 02:36 PM
    • Replies: 8
    • Views: 416
    08-13-2015, 12:06 PM Go to last post
  45. Serial Queuing Model

    Hi all, Does anyone know of any good resources for how to develop a queuing model which has serial servers? It would be a bonus if it uses R. ...

    Started by Prometheus‎, 08-10-2015 09:42 AM
    • Replies: 3
    • Views: 247
    08-13-2015, 04:27 AM Go to last post
  46. Applying Statistics to Random Drug Screening

    Hi everyone. I'm new to the forum and I joined because I was hoping someone could assist me with a problem that I'm trying to solve at work. I've got...

    Started by jonarnold85‎, 08-11-2015 06:21 PM
    • Replies: 5
    • Views: 346
    08-12-2015, 09:51 PM Go to last post
  47. Application of Empirical Bayes Method in Supply Risk

    Hello everyone, I am interested in creating a tool in Excel which would find estimates of the rate of occurrences of non conforming items received...

    Started by Paris‎, 08-12-2015 04:54 PM
    empirical bayes, empirical bayes method, estimators, parameter estimation, poisson-gamma model
    • Replies: 0
    • Views: 187
    08-12-2015, 04:54 PM Go to last post
  48. Specifying interaction terms

    I rarely if ever have any substantive theory to base my models on. That said, say you have five variables you think might impact some DV. Not knowing...

    Started by noetsi‎, 08-11-2015 09:27 AM
    • Replies: 8
    • Views: 330
    08-11-2015, 04:54 PM Go to last post
  49. Is there somewhere online to ask really simple stats questions?

    I mean somewhere where people are patient enough to answer stupid questions? All the statisticians are away at work & I've resorted to googling...

    Started by Julii‎, 08-09-2015 02:42 PM
    • Replies: 5
    • Views: 390
    08-11-2015, 05:43 AM Go to last post
  50. Betting Statistics - Calculation of odds accuracy - what am I measuring here?

    Hello folks! Before anything, an important disclaimer: I am an amateur at statistics and I’m trying to learn by my own. Please bear with me if the...

    Started by sharpbounce‎, 08-10-2015 12:44 PM
    brier score, odds, prediction
    • Replies: 2
    • Views: 278
    08-10-2015, 03:17 PM Go to last post
  51. multi variant analysis for the weighted effects on migration

    Hello, I have two questions: that are connected but not exactly the same. now, I'm not a statistician but more of a historian, so be gentle :) I...

    Started by Amir Schwarz‎, 08-10-2015 01:12 PM
    • Replies: 0
    • Views: 173
    08-10-2015, 01:12 PM Go to last post
  52. Operations Research - Does the independent variable affect sales dollars?

    I have five branches in my company. Each branch has a showroom. Each showroom does not have the same mix of items. Some items are in all showrooms,...

    Started by tpjph92‎, 08-10-2015 09:13 AM
    • Replies: 5
    • Views: 208
    08-10-2015, 11:24 AM Go to last post
  53. Help Required - Using Correlation Factor to Estimate Missing Data

    Dear Gents/Ladies, I need help please, I have to sets of data, which are actually readings of temperatures in two different spots versus time,...

    Started by Kariem‎, 08-05-2015 02:21 PM
    • Replies: 3
    • Views: 304
    08-05-2015, 03:40 PM Go to last post
  54. Centering interaction terms.

    Ender in his 2010 book "Applied Missing Data Analysis" says: "When an analysis model includes an interaction effect between two or more...

    Started by noetsi‎, 07-27-2015 09:26 AM
    • Replies: 12
    • Views: 772
    08-03-2015, 11:15 AM Go to last post
  55. What is the best software for SEM

    In my program it was felt to be Mplus and then EQS. But I am relearning SEM and would like to know which is the best software to relearn with it.

    Started by noetsi‎, 06-18-2015 05:13 PM
    • Replies: 9
    • Views: 691
    07-28-2015, 03:33 PM Go to last post
  56. Post [Discrete test sample size] Number of samples to test after failures occur

    Hello, I work as an engineer at a large manufacturer and we typically use high stress tests on new products to discover failure modes. Sometimes...

    Started by bba‎, 07-27-2015 12:25 PM
    contingency, engineering, failures, sample size
    • Replies: 0
    • Views: 255
    07-27-2015, 12:25 PM Go to last post
  57. spline regression in budgetary data analysis

    I am in the process of analyzing a large data set of financial data. In is roughly the budgets of ~1000 entities over a 15 year time frame. Some...

    Started by the42up‎, 07-26-2015 10:10 AM
    • Replies: 0
    • Views: 240
    07-26-2015, 10:10 AM Go to last post
  58. standard error on a standardized proficiency test -- applicable specific groups?

    In need of some expert advice. Students at my university take a standardized English proficiency test (the TOEIC). There are two sections, Reading...

    Started by Nattie‎, 07-22-2015 08:03 PM
    • Replies: 0
    • Views: 240
    07-22-2015, 08:03 PM Go to last post
  59. SPC Chart - Value outside 3s: outlier on the trend or new trend?

    Hi all. I've just started using SPC at my job to study performance and it's being straightforward, but now I have a question. If I have a trend...

    Started by Dan TheMan‎, 07-13-2015 08:30 AM
    • Replies: 5
    • Views: 395
    07-21-2015, 08:08 AM Go to last post
  60. Reducing # of Charts and Control Limits

    Hi All, Im starting to use spc on my job and our manager told me to reduced number of charts and control limits, I have the following: ...

    Started by sandra3173‎, 07-21-2015 02:56 AM
    • Replies: 0
    • Views: 205
    07-21-2015, 02:56 AM Go to last post

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