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Forum: Applied Statistics

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

  1. Transporting LASSO Model Results to Logistic Reg for Estimates

    I have a dataset which will be entirely made up of binary variables (i.e., ~25 IVs, 1 DV). Variables will likely be correlated. N=~300. -I was...

    Started by hlsmith‎, 06-15-2017 12:30 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 438
    Yesterday, 02:31 PM Go to last post
  2. Question Effectiveness of Tutoring Program on Student Graduation?

    Hi all, I'm hoping that someone can help me verify my planned approach to analyze the effectiveness of a new tutoring program on student...

    Started by irguy‎, Yesterday 11:46 AM
    • Replies: 1
    • Views: 50
    Yesterday, 01:19 PM Go to last post
  3. Test vs gold standard clumsy doubt

    Hello everybody, I want to know if a test I'm working in has a good sensitivity and specificity (compared with a gold standard test), but I am not...

    Started by AJLRB‎, 06-26-2017 02:14 AM
    • Replies: 5
    • Views: 177
    06-27-2017, 08:04 AM Go to last post
  4. Guidance for using propensity score matching in R

    I am new to programming as well as econometrics and would like to ask some guidance for learning. I am planning to calculate the effectiveness of...

    Started by bagocs‎, 06-18-2017 05:34 AM
    econometrics, matching, r programme, stata
    • Replies: 1
    • Views: 150
    06-26-2017, 12:25 PM Go to last post
  5. Multilevel analysis

    This is a thread on the wonderful world of multilevel analysis which is called many different things by various authors. This is the type of...

    Started by noetsi‎, 05-01-2017 11:08 AM
    3 Pages
    1 2 3
    • Replies: 36
    • Views: 1,551
    06-21-2017, 11:15 AM Go to last post
  6. Find standard deviation of costs from different sources

    Hi everyone, I am trying to find the standard deviation of the cost of a certain health treatment. The cost consists of: Out of pocket costs,...

    Started by statpat‎, 06-21-2017 12:37 AM
    • Replies: 1
    • Views: 104
    06-21-2017, 02:23 AM Go to last post
  7. How long is data still useful for

    I commonly read studies based on federal data sets that might be 30 plus years old. Something I had not thought of is, are the results in the study...

    Started by noetsi‎, 06-05-2017 03:30 PM
    • Replies: 8
    • Views: 364
    06-07-2017, 04:26 PM Go to last post
  8. What is unbalanced data

    As in this example.

    Started by noetsi‎, 06-05-2017 10:02 AM
    • Replies: 4
    • Views: 226
    06-05-2017, 01:05 PM Go to last post
  9. 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: 94
    06-05-2017, 12:22 PM Go to last post
  10. descriptive statistics

    the means of two samples of size 50 and 100 respectively are 45.1 and 50.3 and the standard deviations are 8 and 7. obtained the mean and standard...

    Started by osamastat‎, 06-01-2017 11:27 AM
    • Replies: 1
    • Views: 169
    06-01-2017, 11:47 AM Go to last post
  11. Is it appropriate to not compare all samples and rather 2 of them and another 2?

    Iím preparing within a group repeated measures study with duration of 3 weeks. 1st week - no technique is applied, itís a control group, 2nd week -...

    Started by Alyona‎, 05-27-2017 02:21 AM
    • Replies: 0
    • Views: 235
    05-27-2017, 02:21 AM Go to last post
  12. Frequent user of ED

    At work we have 213 patients who were identified as frequent users of the emergency department in a hospital. These patients have over the last...

    Started by scotchpie‎, 05-24-2017 04:13 AM
    • Replies: 3
    • Views: 329
    05-26-2017, 10:15 PM Go to last post
  13. test of proportion

    I have forgotten my basic statistics... I have a group of people who answered two different questions. I have been asked to do a test of...

    Started by noetsi‎, 05-25-2017 10:55 AM
    • Replies: 3
    • Views: 269
    05-25-2017, 01:26 PM Go to last post
  14. MC on Regression Analysis

    I wanted to check over my answers based on these practice questions. Thanks (1) True/False: Clustering is an unsupervised learning problem. (2)...

    Started by shane414‎, 05-22-2017 04:21 PM
    regression analysis
    • Replies: 0
    • Views: 296
    05-22-2017, 04:21 PM Go to last post
  15. Polynomial Regression - Advice please

    Sorry if i'm posting this twice, received an error first time around. Im trying to develop some kind of statistical model that lets me estimate sales...

    Started by TollemG‎, 05-19-2017 06:13 PM
    • Replies: 1
    • Views: 269
    05-22-2017, 07:20 AM Go to last post
  16. Problem finding a fitting statistical test

    Hi. I'm conducting a study, where i am evaluating valuations of companies written by students in their master theses'. In these papers they are...

    Started by Budie‎, 05-16-2017 11:50 AM
    • Replies: 0
    • Views: 257
    05-16-2017, 11:50 AM Go to last post
  17. Leverage analysis for groups of outliers

    There are a wide range of statistics that deal with leverage of individual data points (that is their impact on the regression line such as DFBETA)....

    Started by noetsi‎, 05-09-2017 10:58 AM
    • Replies: 6
    • Views: 547
    05-11-2017, 02:08 PM Go to last post
  18. Merging Relevant Statistics

    I'm currently working on a computer science project that can tell a user how good a particular phrase for a given product is. The particular product...

    Started by mjsweet‎, 05-07-2017 03:59 PM
    • Replies: 0
    • Views: 238
    05-07-2017, 03:59 PM Go to last post
  19. How to segment customers by demographic data to maximize profit?

    I have a data set with profit for each customer (in some cases it is negative) as well as various demographic categorical variables (gender, age...

    Started by tennisfan‎, 04-17-2017 09:36 AM
    customer analytics, demographics, maximization, profit
    • Replies: 3
    • Views: 421
    05-03-2017, 08:31 AM Go to last post
  20. Statistical results of continuous, finite, closed form functions

    I've done a lot of digging but all the keywords point to continuous random variables, and that's not what I'm interested in. I'm interested in the...

    Started by Dunce‎, 05-02-2017 05:17 PM
    • Replies: 0
    • Views: 251
    05-02-2017, 05:17 PM Go to last post
  21. Applying statistical analysis with multiple combinations?

    Would this just be performed through minitab by looking at interaction plots?

    Started by jki‎, 04-28-2017 09:45 PM
    • Replies: 1
    • Views: 311
    05-01-2017, 11:03 AM Go to last post
  22. Bayesian (structural) VAR model problems

    Hello, I will use a bayesian structural vector autoregressive model for a macroeconomic paper. It is very hard to find answers to many questions in...

    Started by schteeke1‎, 04-25-2017 06:57 AM
    bayesian var lag length
    • Replies: 0
    • Views: 354
    04-25-2017, 06:57 AM Go to last post
  23. copula-based VaR calculation in R

    I'm working on a value-at-risk calculation using copulas on different stock market indices. I know how to fit the copula, but I can't figure out how...

    Started by maaarten9‎, 04-23-2017 11:24 AM
    copula, rsoftware, value at risk
    • Replies: 0
    • Views: 309
    04-23-2017, 11:24 AM Go to last post
  24. 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: 296
    04-20-2017, 05:46 PM Go to last post
  25. Calculating median category

    I have ordered categories (e.g., 0-3 months, 4-6 months) and the number of customers who were in each category (say 45 in the first 50 in the second,...

    Started by noetsi‎, 04-17-2017 05:51 PM
    • Replies: 0
    • Views: 289
    04-17-2017, 05:51 PM Go to last post
  26. Lightbulb Baseball Stats: Using Multiple Factors With Variable Ranges As Input

    Hello, I am working on creating a statistic to predict players most likely to get a hit on any given day. In this statistic, I am using five...

    Started by Eric Alan‎, 04-12-2017 10:45 PM
    baseball, multiple data sets, normalize dataset, range, weighted
    • Replies: 0
    • Views: 356
    04-12-2017, 10:45 PM Go to last post
  27. Manova

    I have at least 20 recipes each with 8 different chemicals. each of these 20 recipes produces at least 2 outcomes that is dependent varaibles. What...

    Started by madyira‎, 04-10-2017 09:35 AM
    • Replies: 1
    • Views: 326
    04-10-2017, 10:03 AM Go to last post
  28. How to amend one variable in a Full Factorial Design during experimentation

    I have a 2 level, 4 factor DOE set up for 16 runs. These are all continuous factors. I'd like to amend one of the factors to a narrower range. I am...

    Started by redrover123‎, 04-07-2017 04:46 PM
    • Replies: 4
    • Views: 403
    04-10-2017, 06:48 AM Go to last post
  29. Fundraising Evaluation Design

    I work for a nonprofit that is hoping to determine whether or not certain corporate parameters are correlated with joining our organization as a...

    Started by clcrabtr‎, 04-03-2017 08:55 AM
    • Replies: 3
    • Views: 446
    04-03-2017, 10:28 AM Go to last post
  30. Question on forecast combinations

    Hi All, Say I have a variable Z that I believe can modelled/forecasted via two different thematic models in the standard regression form: E1 =...

    Started by nomadzero‎, 04-03-2017 04:07 AM
    • Replies: 0
    • Views: 262
    04-03-2017, 04:07 AM Go to last post
  31. Hodrick-Prescott issue

    Hi, I'm building a Leading Indicator for the economic cycle similar to the OECD's (http://www.oecd.org/std/leading-indicators/), so I use...

    Started by pgrign‎, 04-03-2017 03:01 AM
    • Replies: 0
    • Views: 245
    04-03-2017, 03:01 AM Go to last post
  32. graduating multi-decrement tables

    I need to construct a multi-decrement table and I've had much success withestimation of crude rates, but now I feel that I need to graduate the rates...

    Started by chippy‎, 03-28-2017 10:57 AM
    decrements, estimation
    • Replies: 2
    • Views: 468
    04-01-2017, 11:54 PM Go to last post
  33. What do statistical tests really do

    The background. We generated customer to counselor ratios for our counties (these are population data not a survey. That is we queried all our...

    Started by noetsi‎, 03-02-2017 03:27 PM
    3 Pages
    1 2 3
    • Replies: 43
    • Views: 4,489
    04-01-2017, 11:50 PM Go to last post
  34. Measuring the effect of in-store Promotions

    Hello, I am testing the effect of a new in-store promotion technique (treatment). It is applied during product promotions, as a compliment to...

    Started by KARPOS‎, 03-30-2017 11:58 AM
    applied statistics, confidence interval, probability, regression model
    • Replies: 1
    • Views: 377
    04-01-2017, 11:38 PM Go to last post
  35. log(0) should have a real value!!!

    Dear all, Iíve been stuck for quite some time with a problem that relates to use of log-scale with values that equal zero. My data comes from...

    Started by ritmaniac‎, 03-21-2017 07:04 AM
    anova, censoring, linear regression, log scale, log transformation, logarithmic
    • Replies: 4
    • Views: 645
    03-27-2017, 11:27 AM Go to last post
  36. Is R square useful at all?

    I know it can not be used in non-linear regression at all but I found this comment a bit shocking given how commonly R square is in the literature....

    Started by noetsi‎, 03-20-2017 02:47 PM
    r^2
    • Replies: 11
    • Views: 1,003
    03-26-2017, 11:32 AM Go to last post
  37. When the central limit theorem works...and when it doesn't?

    I had always thought that given say a 100 cases the central limit theorem always worked. But today I read (in a book about multilevel analysis)...

    Started by noetsi‎, 03-20-2017 11:35 AM
    • Replies: 10
    • Views: 728
    03-22-2017, 06:09 PM Go to last post
  38. Multiple hypothesis testing

    I am reading one of those books that make my head hurt, because it raises many issues and disagrees with what to me is established views on a topic...

    Started by noetsi‎, 03-20-2017 12:02 PM
    • Replies: 10
    • Views: 668
    03-22-2017, 02:11 PM Go to last post
  39. Question comparison of multivariate (4 DV and 1 IV) datasets (data matrices)

    I want to compare 06 different Multivariate datasets (data matrices). Each dataset consists of SAME number of columns but different number of rows....

    Started by waqasurrehman‎, 03-20-2017 05:51 AM
    multivariate, pca analysis
    • Replies: 0
    • Views: 442
    03-20-2017, 05:51 AM Go to last post
  40. Good measure of non-linear correlation

    Many of the measures of correlation, notably pearson but I think Spearman rho as well, do not measure non-linear relationships well. Are there any...

    Started by noetsi‎, 03-17-2017 02:22 PM
    • Replies: 5
    • Views: 786
    03-18-2017, 03:50 AM Go to last post
  41. Question Conditional Multi-variate Normal Distribution

    Dear all, I would like to find a computationally quick and sufficiently accurate way (i.e., either analytically or numerical approximation) to...

    Started by sdj‎, 03-17-2017 05:03 PM
    conditional density, multivariate normal
    • Replies: 0
    • Views: 443
    03-17-2017, 05:03 PM Go to last post
  42. Bootstrapping 0.632+ AUC with fixed test sets

    Hi, I want to compare different binary classifiers in terms of their AUC values on test sets. I have data over one year with about 2000...

    Started by Mkkl‎, 03-11-2017 06:00 AM
    auc, bootstrap, efron, fixed, test set
    • Replies: 0
    • Views: 594
    03-11-2017, 06:00 AM Go to last post
  43. Question How to assign new data to an existing clustering

    This is the situation. First, I performed factor analysis on 20 continuous variables, and reduced those to 10 factors using SPSS. Then, I did...

    Started by wmacooper‎, 03-08-2017 11:06 AM
    cluster analysis, factor analysis, prediction model, spss
    • Replies: 0
    • Views: 701
    03-08-2017, 11:06 AM Go to last post
  44. Using the Excel Rand() Function in Sampling

    I have quick question with regards to using the Excel's Rand() function. Please see the below link for the excel spreadsheet example. My...

    Started by R2015‎, 03-07-2017 09:58 AM
    • Replies: 1
    • Views: 804
    03-07-2017, 10:42 AM Go to last post
  45. Looking for feedback on application of chi-square test

    I am a cost engineer working in the building construction field. I am seeking some advice/feedback on the use of a chi-square test for assessing how...

    Started by Pickle57‎, 03-03-2017 11:38 AM
    chi-square help, multinomial
    • Replies: 5
    • Views: 735
    03-04-2017, 02:14 PM Go to last post
  46. Proof of Kalman filter related lema

    Hi... Can you please provide a proof of the formula given on the attached image?

    Started by liqokeli‎, 03-03-2017 09:36 AM
    • Replies: 0
    • Views: 524
    03-03-2017, 09:36 AM Go to last post
  47. Help with measurement system analysis with destructive samples

    Hello everyone, I am an internship student and for my company I have to develop a method to test if their material is brittle or not. They bought...

    Started by biochem95‎, 02-28-2017 07:46 AM
    gage r&r, minitab, msa
    • Replies: 2
    • Views: 818
    03-02-2017, 01:35 PM Go to last post
  48. Deciding what distribution to use in a monte carlo distribution (business)

    I am not working on a specific problem right now - just learning how to do monte carlo for business uses (so I am not testing a specific statistic,...

    Started by noetsi‎, 02-28-2017 03:59 PM
    • Replies: 6
    • Views: 1,113
    03-01-2017, 11:18 AM Go to last post
  49. What type of analysis is this?

    This is exactly the type of analysis I need to learn to do, but I don't know where to look for it. Is it finance, operations research, planning.... ...

    Started by noetsi‎, 02-28-2017 04:25 PM
    • Replies: 3
    • Views: 1,066
    03-01-2017, 09:18 AM Go to last post
  50. Exercise on standard distribution

    Hello, Suppose I want to calculate the probability for a user to pass from a basic to a premium account within the end of Q1 (i.e. end of march). ...

    Started by faber1999‎, 02-26-2017 10:35 AM
    gaussian distribution, normal distribution, probability estimate, standarddeviation
    • Replies: 0
    • Views: 1,307
    02-26-2017, 10:35 AM Go to last post
  51. 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: 190,496
    02-23-2017, 10:18 AM Go to last post
  52. Monte Carlo simulations

    I am not using this to test the results of violations of statistical assumptions or the like. I am using it to analyze business issues for which no...

    Started by noetsi‎, 02-10-2017 04:53 PM
    2 Pages
    1 2
    • Replies: 24
    • Views: 3,430
    02-22-2017, 03:15 PM Go to last post
  53. Lightbulb How to compare two PCA vectors - classification and clustering problem

    Dear all, Assume I have one reference PCA vector and two sample PCA vectors, all of the same length. I want to know which of the two sample PCA's...

    Started by horek‎, 02-22-2017 02:46 PM
    principal components
    • Replies: 0
    • Views: 655
    02-22-2017, 02:46 PM Go to last post
  54. interpreting random effects in a GLMM

    I just want to check with everyone about my interpretation of a model results. I am beginning to second guess myself so I want to make sure I am...

    Started by the42up‎, 02-21-2017 09:02 PM
    • Replies: 0
    • Views: 672
    02-21-2017, 09:02 PM Go to last post
  55. Generalized Linear Models

    Anyone know a good introductory book or books on Generalized Linear Models. I have worked with these before, but need to learn them better. I am...

    Started by noetsi‎, 02-10-2017 02:38 PM
    • Replies: 1
    • Views: 969
    02-19-2017, 04:10 PM Go to last post
  56. [SOLVED] very simple logic question

    This is probably the simplest question ever asked here.....:shakehead I have been asked for the average time customers spent in a given service. ...

    Started by noetsi‎, 02-16-2017 05:30 PM
    • Replies: 4
    • Views: 1,377
    02-17-2017, 05:07 PM Go to last post
  57. Time series thread

    These don't get much attention now that vinux is rarely here.... In ARIMA models you sometimes have to test for seasonal non-Stationarity. One way...

    Started by noetsi‎, 01-14-2017 01:51 PM
    • Replies: 12
    • Views: 3,291
    02-02-2017, 11:34 AM Go to last post
  58. Mixing populations

    I'm not al that familiar with statistics, so I hope I use the correct terminology. In most materials you get some normal distribution of the values...

    Started by Descobar‎, 01-30-2017 07:28 AM
    • Replies: 12
    • Views: 1,759
    02-01-2017, 03:15 AM Go to last post
  59. Smile Comparing subsets of a population with a very different size (power law case)?

    My population (12000 data) is characterized by events that are either of type A or of type B. My goal is to figure out whether the relative...

    Started by angy‎, 01-30-2017 05:11 AM
    power law, proportion, statistical significance
    • Replies: 0
    • Views: 1,139
    01-30-2017, 05:11 AM Go to last post
  60. Calculating Optimal Level of Maintenance Spend

    New to this forum and my stat skills have gotten quite rusty since earning my six sigma bb 8 years ago. Coming here to Basically I want to figure...

    Started by TollemG‎, 01-19-2017 09:41 AM
    • Replies: 7
    • Views: 2,668
    01-27-2017, 03:46 PM Go to last post

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