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Threads 961 to 1020 of 1509

Forum: Applied Statistics

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

  1. Question Setting a Threshold using Statistical Techniques

    Hi Guys, I am trying to find the threshold of the reliability. It is not "statistical reliability", it's just reliability in normal terms. Client...

    Started by Harmy‎, 02-17-2013 07:29 PM
    • Replies: 0
    • Views: 2,774
    02-17-2013, 07:29 PM Go to last post
  2. Stationarity tests and cointegration question


    Started by Beeson‎, 02-15-2013 09:01 PM
    • Replies: 0
    • Views: 1,357
    02-15-2013, 09:01 PM Go to last post
  3. Pareto charts

    Hello small question... why does Pareto charts called Pareto charts ? Is it because Pareto invented them, or is it because the line over the...

    Started by NN_STAT‎, 02-11-2013 04:17 AM
    • Replies: 1
    • Views: 2,071
    02-12-2013, 09:55 AM Go to last post
  4. Relative risk from sensitivity

    Hi all, I am working on homework from my categorical responses stats class and stumped on the last question. "A diagnostic test has...

    Started by jhartsho‎, 02-11-2013 05:40 PM
    • Replies: 0
    • Views: 3,790
    02-11-2013, 05:40 PM Go to last post
  5. event time span analysis

    Hi, I want to make an analysis which exhibit user events in the game according to his cumulative play time The problem, every user has different...

    Started by asherbono‎, 02-09-2013 09:15 AM
    distributation, statistical model, statistics
    • Replies: 0
    • Views: 1,876
    02-09-2013, 09:15 AM Go to last post
  6. data points and correlation result

    Hi Guys First I hope that my question is in the right place and that it's been a while since i've been doing stats. Recently I've found the...

    Started by abu_stats‎, 02-08-2013 04:49 AM
    • Replies: 5
    • Views: 1,758
    02-08-2013, 03:23 PM Go to last post
  7. F Dist Value for Relative Risk CI with McNemar data

    Quick question. I am using exact McNemar test with paired data (via SAS). I want to calculate relative risk (RR) with exact confidence intervals...

    Started by hlsmith‎, 02-06-2013 10:48 AM
    • Replies: 8
    • Views: 2,300
    02-06-2013, 02:44 PM Go to last post
  8. Suggestions to improve this sports model?

    Based on the second table "January window spend by place..." in this article, I came up with an LM attempting to determine if, in the English soccer...

    Started by Norm517‎, 02-05-2013 02:15 PM
    applied statistics, linear model, soccer, sports
    • Replies: 2
    • Views: 1,742
    02-05-2013, 04:40 PM Go to last post
  9. deal with unreliable data points

    This is a Search Engine Marketing question. Suppose I bid 100K keywords in Google. 70K of them have no conversion and many of these 70K have a very...

    Started by aha123‎, 02-01-2013 01:16 AM
    • Replies: 1
    • Views: 2,043
    02-05-2013, 09:51 AM Go to last post
  10. time series question

    1. Xt = Xt-1 Xt-2 + et 2. Yt = 0.6Yt-5 + et. how to find the E(Xt) and E(Yt)

    Started by jccg133133‎, 02-02-2013 01:15 AM
    • Replies: 1
    • Views: 1,732
    02-02-2013, 01:17 AM Go to last post
  11. stock market probability

    suppose i have the following probabilities of making a profitable stock trade: day 1: 2/3 day 2: 2/3 day 3: 2/2 day 4: 3/4 day 5: 0/2 how...

    Started by medc‎, 02-25-2009 04:06 PM
    • Replies: 9
    • Views: 9,317
    01-31-2013, 10:33 AM Go to last post
  12. Random numbers from normal distribution with given mean, st dev, Min, and Max

    Hi All !!! I would appreciate to have hints of the following issue. I was wondering how to get random values from a normal distribution with a...

    Started by gianmarco‎, 01-30-2013 03:33 AM
    • Replies: 5
    • Views: 9,111
    01-30-2013, 11:09 AM Go to last post
  13. Game industry interview + analysis

    Hello there, Some days ago I applied for a job in a famous company; after passed the first two selections they asked me to go at their offices for...

    Started by Mathison‎, 01-23-2013 03:21 PM
    • Replies: 12
    • Views: 3,569
    01-29-2013, 12:55 PM Go to last post
  14. Question Seeking help to identify the proper method to explain... correlation??

    Hi there, I am revisiting statistical methods in my professional life, about a decade after studying the topic. I have a large dataset in excel,...

    Started by teapea‎, 01-28-2013 03:52 PM
    • Replies: 3
    • Views: 1,894
    01-28-2013, 05:30 PM Go to last post
  15. variation for treatment effect in meta-analysis

    Hello, I am conducting a meta-analysis towards the effect of protein supplementation on walking speed. The studies included in the analysis...

    Started by dr. Swole‎, 01-27-2013 10:29 AM
    • Replies: 0
    • Views: 1,915
    01-27-2013, 10:29 AM Go to last post
  16. 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: 1,922
    01-26-2013, 08:04 AM Go to last post
  17. what does it means by no significance autocorrelation coefficient

    in reading time series book, then found this statement "If the residuals are white noise, then it is expected that no significant autocorrelation...

    Started by harris‎, 01-18-2013 10:01 AM
    • Replies: 3
    • Views: 3,361
    01-22-2013, 02:57 PM Go to last post
  18. Question Use actual-to-expected ratios as similarities for MDS?

    Hi! I'm making 2D and 3D charts for presentation to illustrate how various television networks share audience. To do this, I have source data on...

    Started by Kevin Killion‎, 01-22-2013 12:56 PM
    • Replies: 0
    • Views: 1,765
    01-22-2013, 12:56 PM Go to last post
  19. Lightbulb Mechanical Engineer, four cavity mold, how many parts to test?

    My friend is a mechanical engineer at a company in CT. I was pretty good at stats back in my day so he asked me to solve this for him. This is a REAL...

    Started by KMJG‎, 01-21-2013 10:22 PM
    confidence interval, help needed, mechanical engineering, statistics
    • Replies: 1
    • Views: 1,531
    01-22-2013, 02:24 AM Go to last post
  20. Randomized test?

    I have 7 scores that are split into groups of 4 and 3. This produces 35 unique combinations of the scores. I need to find the difference in means of...

    Started by sarcophagus‎, 01-19-2013 08:35 PM
    • Replies: 2
    • Views: 1,659
    01-19-2013, 09:31 PM Go to last post
  21. Survey Data for performance metrics

    Dear Stats Forum, I have a question about how to use subjective survey data in the development of design and performance targets for a product. ...

    Started by rclukey‎, 01-18-2013 01:07 PM
    likert, subjective, survey, target
    • Replies: 0
    • Views: 1,541
    01-18-2013, 01:07 PM Go to last post
  22. Suggest analysis?

    I am an experience programmer and mathematician, but only have basic statistics, probability, and regression coursework. I use both R and SAS daily...

    Started by cjohnson‎, 01-16-2013 08:41 PM
    • Replies: 1
    • Views: 1,831
    01-17-2013, 12:24 PM Go to last post
  23. Smile Need your help on my "model". Look look look!

    Brief introduction: I work at Loyds Industri AS, and come fresh out of school. Loyds have over the past three years spent around $4M on developing a...

    Started by aleksaah‎, 01-16-2013 11:17 AM
    • Replies: 0
    • Views: 1,887
    01-16-2013, 11:17 AM Go to last post
  24. Insurance Data Request

    Good day Forum, Currently I've been experimenting with statistical techniques on seismological data - which can be readily obtained, but now I...

    Started by chippy‎, 01-10-2013 08:28 AM
    • Replies: 2
    • Views: 2,048
    01-11-2013, 08:21 AM Go to last post
  25. Calculating variance when proportions are not of population

    I've been racking my brains on this and can't find a solution that gives me that warm fuzzy feeling inside and I was hoping that somebody here could...

    Started by potterbro‎, 08-30-2012 08:55 AM
    • Replies: 6
    • Views: 6,245
    01-09-2013, 01:17 PM Go to last post
  26. Bunck of binary variables - which model to use

    Hi, I'm struggling a bit regarding which model to use. I got a bunch of yes/no answers to price questions. Like the following example: ...

    Started by kenniwr‎, 10-25-2012 02:20 AM
    • Replies: 1
    • Views: 1,540
    01-09-2013, 01:12 PM Go to last post
  27. Measuring variability - Research experiment

    Hi guys I'm looking at the variability of temperatures that can stimulate pain in different subjects and whether this variability decreases at...

    Started by nianu‎, 01-06-2013 10:45 AM
    • Replies: 1
    • Views: 1,384
    01-06-2013, 10:46 AM Go to last post
  28. why we need new lifetime model?

    Hello everybody! as you see the title, I want to know that why we need new lifetime mode like exponential, weibull and other model which related...

    Started by z_stat‎, 12-12-2012 03:47 AM
    • Replies: 7
    • Views: 1,750
    01-04-2013, 01:07 PM Go to last post
  29. help me about ARMA model

    Hi guys ! This is my first post and i have a sort of a dumb question : Do the time serie need to be stationary in order to model it to ARMA ?? ...

    Started by Nooob‎, 12-29-2012 08:35 AM
    • Replies: 3
    • Views: 1,773
    01-01-2013, 10:50 AM Go to last post
  30. data normalization

    Hi I want to ask that if i normalize the data and then use it into my calculation. To what percent it can introduce error into my calculation ...

    Started by uzmeed‎, 12-31-2012 11:05 AM
    • Replies: 1
    • Views: 1,786
    12-31-2012, 11:13 AM Go to last post
  31. Panel Cointegrated data analysis

    Carrying out Panel data analysis requires what and what steps in STATA

    Started by waxyfaxy‎, 12-31-2012 09:13 AM
    • Replies: 0
    • Views: 1,794
    12-31-2012, 09:13 AM Go to last post
  32. Question Test for Rarely Occurring Serial Correlation

    Hi This is a problem in industrial statistics. We have an instrument which is examined about every 6 weeks by testing colour standards. Some...

    Started by Scriptham‎, 11-12-2012 10:05 AM
    • Replies: 1
    • Views: 1,374
    12-28-2012, 09:01 AM Go to last post
  33. Out-of-sample likelihood as a forecast accuracy metric

    In ageconsearch.umn.edu/bitstream/18947/1/cp01no01.pdf the authors claim that in order to compare the forecasting performance of two non-nested...

    Started by LostInNY‎, 12-26-2012 03:17 PM
    forecast comparison
    • Replies: 0
    • Views: 1,885
    12-26-2012, 03:17 PM Go to last post
  34. Filtering sample data -- catastrophic failure?

    Is it legitimate to filter results AFTER a test, but BEFORE calculating statistics? Here are two examples, each using a sample size of 100: 1. ...

    Started by JohnathanStein‎, 12-18-2012 05:25 AM
    • Replies: 0
    • Views: 1,882
    12-18-2012, 05:25 AM Go to last post
  35. how to determine if size and frequency of an event increase or decrease over time?

    Hello, I have a data set of events, each described by a time and a value. I want to examine if a) frequency of events increases or decreases over...

    Started by antologic‎, 12-15-2012 08:27 PM
    • Replies: 2
    • Views: 1,805
    12-15-2012, 10:49 PM Go to last post
  36. Multivariate Analysis of Rare Events

    Hello all, I have an interesting problem that I'm trying to find a correct or appropriate direction to work on. I will summarize things to the best...

    Started by Optimalist‎, 12-12-2012 01:45 PM
    • Replies: 0
    • Views: 1,565
    12-12-2012, 01:45 PM Go to last post
  37. Question Collecting partial data hierarchical model with 100+ indicators

    Hi, I am looking to conduct a survey accross multiple firms. however, what I want to measure comes down to more than 100 indicators. Obviously...

    Started by simpleme‎, 12-11-2012 11:16 AM
    • Replies: 3
    • Views: 1,353
    12-12-2012, 09:01 AM Go to last post
  38. How to compare GARCH models?

    I have estimated various GARCH models and now I want to find the model that fits the data most accurately. Can I just compare the log-likelihood...

    Started by T27667‎, 10-11-2012 06:44 AM
    • Replies: 1
    • Views: 1,447
    12-11-2012, 03:28 AM Go to last post
  39. Time series (stocks) synchronization/ comparably!

    Hi guys can anybody help me please, I want to do a linear regression, but the 2 time-series (stock price) have different lengths. In short how...

    Started by Plankton26‎, 11-28-2012 09:56 AM
    • Replies: 2
    • Views: 1,963
    12-11-2012, 03:20 AM Go to last post
  40. overal test differ from lsmeans/pdiff results

    Hi all, I run proc mixed and I am not sure how to explain the following results... I am interested in starch content in 3 parts of the same...

    Started by szm‎, 12-10-2012 03:26 PM
    anova, levels, lsmeans, mixed, pairwise comparisons
    • Replies: 3
    • Views: 2,294
    12-10-2012, 04:05 PM Go to last post
  41. MAP estimator (Bayesian statistics)

    hello. i am having a little bit of trouble wrapping my head around maximum a posteriori (MAP) estimators in bayesian statistics. i understand that...

    Started by will22‎, 12-07-2012 11:57 PM
    • Replies: 7
    • Views: 1,772
    12-08-2012, 05:37 PM Go to last post
  42. Case studies for a design database?

    Hi all, I am working on developing an online searchable database of research designs, and at the moment I am writing a grant to support this (in...

    Started by Eugenie‎, 12-07-2012 12:48 PM
    • Replies: 1
    • Views: 1,191
    12-07-2012, 01:09 PM Go to last post
  43. If I have a special indicator, is it necessary to decompose a time series?

    Hello guys, I'm quite confused now and can't seem to solve my problem concearning time series analysis, I hope some of you might be able to help...

    Started by Spunsh‎, 12-07-2012 11:56 AM
    • Replies: 0
    • Views: 991
    12-07-2012, 11:56 AM Go to last post
  44. Optimal Ratio of Case to Controls

    I have been asked by a reviewer to support my selection of cases to controls, so I am on the hunt for cite-able references on optimal ratio of cases...

    Started by hlsmith‎, 12-04-2012 10:59 AM
    • Replies: 3
    • Views: 2,302
    12-04-2012, 04:17 PM Go to last post
  45. help model from paper about econometric

    Hi all I am new in econometric and stata and i d like adjust my data to the model proposed by fortin (1995) using nive model and LES model, I am...

    Started by Rodrigo Badilla Cabrera‎, 12-03-2012 05:52 PM
    • Replies: 0
    • Views: 1,304
    12-03-2012, 05:52 PM Go to last post
  46. Exogenous Regime Switching Models

    Hi, I'm new to the site, so bear with me! I currently have a model that measures inflation expectations as follows: y(t) = a*x(t) +...

    Started by Esses51‎, 12-03-2012 04:48 PM
    economics, inflation expecations, regime switching models, tar, time series
    • Replies: 0
    • Views: 1,505
    12-03-2012, 04:48 PM Go to last post
  47. When is a mode too freequent to be true?

    Hi, I'm a non-specialist looking for some help with one practical problem. I hope I'm on the right forum for that (and if not - I'll appreciate...

    Started by Some Body‎, 11-20-2012 06:25 PM
    • Replies: 11
    • Views: 1,680
    11-26-2012, 07:53 AM Go to last post
  48. plotting high dimensional matrix

    Hi All, I have a large 2D matrix (ie 10K x 10K ) that defines the similarity between members of a group. ie A B C D A 5 2 ...

    Started by everett.jk‎, 11-15-2012 10:46 PM
    • Replies: 7
    • Views: 1,913
    11-15-2012, 11:43 PM Go to last post
  49. Book on computational data analytics and applications of data analytics

    hi, I'm looking for good books or papers or articles for understanding : 1. Computational Techniques for Large-Scale Data Analysis this covers...

    Started by hencre‎, 11-09-2012 08:55 PM
    analytics, applications, computational, data
    • Replies: 0
    • Views: 1,639
    11-09-2012, 08:55 PM Go to last post
  50. Newey West and Prediction Interval

    I have a data set of 76 pairs. Y is highly dependent on X but the residuals are serially correlated. Using linear regression, I wish to predict Y...

    Started by cisaak‎, 11-09-2012 03:27 PM
    • Replies: 0
    • Views: 1,806
    11-09-2012, 03:27 PM Go to last post
    • Replies: 0
    • Views: 1,892
    11-09-2012, 11:12 AM Go to last post
  51. How to choose a target variable ?

    Hello all, I have this problem, I have an array of 30 sensors, each gives a response when being sampled. I want to know if the sensors can...

    Started by NN_STAT‎, 11-08-2012 03:07 AM
    • Replies: 0
    • Views: 1,442
    11-08-2012, 03:07 AM Go to last post
  52. Independent and Serial Correlation

    I have a set of 76 annual occurrences of x and y. When I run a linear regression, y is significantly correlated to x. The Durbin-Watson test shows...

    Started by cisaak‎, 08-15-2012 01:23 PM
    • Replies: 6
    • Views: 4,157
    11-07-2012, 09:56 AM Go to last post
  53. Comparison of means (1 continuous DV and 1 categorical IV)

    I have 1 continuous dependent variable, nitrate, and 1 categorical independent variable, geology (12 categories). I want to compare the mean nitrate...

    Started by Nosil‎, 10-30-2012 12:50 PM
    • Replies: 2
    • Views: 2,754
    10-31-2012, 04:13 AM Go to last post
  54. Lightbulb Probit model -how to use

    I am trying to understand how to interpret the result of Zmijewski bankruptcy prediction model based on probit model. Wanda A. Wallace wrote in this...

    Started by villek‎, 10-28-2012 10:11 AM
    bankruptcy prediction, probit, zmijewski
    • Replies: 0
    • Views: 2,551
    10-28-2012, 10:11 AM Go to last post
  55. calculation of the correlation between an index and the etf

    hi, I want to calculate the correlation between an index and an etf, but there is a mistace in my code and I don't know how remedy the defect. ...

    Started by B_P‎, 10-26-2012 05:39 AM
    • Replies: 0
    • Views: 2,537
    10-26-2012, 05:39 AM Go to last post
  56. Calculating Value-at-Risk using SARIMA-GARCH

    I try to estimate the Value-at-Risk for various times in the future. My time series shows seasonality, therefore I think that a SARIMA-model would be...

    Started by murmel1337‎, 10-25-2012 03:20 AM
    • Replies: 0
    • Views: 2,074
    10-25-2012, 03:20 AM Go to last post
  57. No ARCH test

    If you are going to test for no arch effects up to 2 lags, say, for a sample of T=3572 residuals, e, is the approach then the following: Calculate...

    Started by T27667‎, 10-24-2012 05:42 PM
    • Replies: 0
    • Views: 1,505
    10-24-2012, 05:42 PM Go to last post
  58. different fiscal year end and fama macbeth regress

    dear all, can i apply fama macbeth regression for a short time period 3-4 years? plus if the sample firms consist of firms with fiscal year end at...

    Started by gihan‎, 10-24-2012 05:34 PM
    • Replies: 0
    • Views: 2,034
    10-24-2012, 05:34 PM Go to last post
  59. Root Mean Squared Error/Deviation in Simulation Studies....

    hello members! :wave: i am having a little bit of trouble understanind what the Root Mean Squared Error (RMSE) or Root Mean Squared Error...

    Started by will22‎, 10-22-2012 12:15 PM
    • Replies: 0
    • Views: 4,600
    10-22-2012, 12:15 PM Go to last post

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