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Forum: Applied Statistics

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

  1. Red face Setting Statistically Significant Improvement Goals

    Hi: I work in clinical informatics for very large academic hospital. Currently we are attempting to set 2016 goals for our patient satisfaction...

    Started by Lindseylr‎, 12-15-2015 03:05 PM
    • Replies: 2
    • Views: 3,200
    12-29-2015, 10:16 PM Go to last post
  2. Can we use bar chart to represent averages?

    Hi to all, I would like to know if the heights of the bars of a bar chart can represent averages, or if they can just represent frequencies. I have...

    Started by Eometh‎, 12-18-2015 08:05 AM
    • Replies: 2
    • Views: 2,726
    12-18-2015, 11:54 PM Go to last post
  3. Seasonal SARIMA forecasting time series

    Hello, This is a forecasting problem for an SARIMA model in time series analysis. I'll be very appreciated if you help me..Thanks.

    Started by mehmatw‎, 12-16-2015 06:35 PM
    • Replies: 0
    • Views: 821
    12-16-2015, 06:35 PM Go to last post
  4. Exclamation ARMA(1,1) forecasting time series

    Hello, This is a forecasting problem for an ARMA(1,1) model in time series analysis. I'll be very appreciated if you help me..Thanks.

    Started by mehmatw‎, 12-16-2015 06:34 PM
    • Replies: 0
    • Views: 987
    12-16-2015, 06:34 PM Go to last post
  5. Process hypothesis testing - difference between means with known method variance

    Dear experts, I have a measurement method. To evaluate the method I have used it to take 24 parallell samples from a production process and repeated...

    Started by dboy‎, 12-09-2015 07:34 AM
    • Replies: 0
    • Views: 1,186
    12-09-2015, 07:34 AM Go to last post
  6. Is it possible to measure population targets using random sampling & likert surveys?

    Hi! I am not an expert and I thought I would ask this question here and request some help - anything would help! I have a target to reach 100 ...

    Started by Rabihy‎, 12-08-2015 10:40 AM
    • Replies: 0
    • Views: 996
    12-08-2015, 10:40 AM Go to last post
  7. Unhappy chi square test for various probability distribution

    i want to find out the goodness of fit statistics and p value of various probability distribution by using chi square test. distributions are: 1....

    Started by alam06es‎, 12-08-2015 02:00 AM
    • Replies: 0
    • Views: 1,412
    12-08-2015, 02:00 AM Go to last post
  8. Automatic determination of pump operation mode

    Hi everybody, I have a data set with pump speed data measured every hour for the period of several months. I have attached the file with the pump...

    Started by AlexeyY‎, 12-07-2015 12:14 AM
    • Replies: 0
    • Views: 1,608
    12-07-2015, 12:14 AM Go to last post
  9. 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: 4
    • Views: 2,071
    12-06-2015, 05:24 AM Go to last post
  10. Need Help with Correlation

    Hi, I am trying to figure out the best way to calculate correlation with data I have for my business. Here is an example of what I the fields: ...

    Started by ericsd‎, 12-05-2015 01:29 PM
    correlated data, correlation, correlation analysis
    • Replies: 2
    • Views: 1,663
    12-05-2015, 04:05 PM Go to last post
  11. Creating an index - dependent variable, weighting, research question

    Caveat: I'm basically teaching myself statistics to complete a dissertation so forgive ignorance and bumbling through this, I promise I'm googling...

    Started by Jericho‎, 12-03-2015 10:54 AM
    • Replies: 0
    • Views: 1,454
    12-03-2015, 10:54 AM Go to last post
  12. 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: 3,600
    11-19-2015, 05:22 PM Go to last post
  13. Moment generating function

    Please ignore, all sorted now

    Started by calypso‎, 11-17-2015 02:33 PM
    • Replies: 0
    • Views: 1,069
    11-17-2015, 02:33 PM Go to last post
  14. 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: 1,146
    11-17-2015, 01:26 PM Go to last post
  15. 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: 1,957
    11-14-2015, 08:28 PM Go to last post
  16. 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: 1,023
    11-13-2015, 11:09 AM Go to last post
  17. 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: 1,407
    11-11-2015, 07:06 AM Go to last post
  18. 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: 1,441
    11-10-2015, 07:52 AM Go to last post
  19. 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: 973
    11-06-2015, 08:16 AM Go to last post
  20. 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: 858
    11-06-2015, 03:27 AM Go to last post
  21. 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: 707
    11-02-2015, 04:53 AM Go to last post
  22. 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 11:19 AM
    • Replies: 5
    • Views: 1,407
    10-30-2015, 04:11 PM Go to last post
  23. 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 12:31 PM
    • Replies: 3
    • Views: 1,674
    10-27-2015, 10:45 AM Go to last post
  24. 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 03:19 AM
    • Replies: 0
    • Views: 1,386
    10-23-2015, 03:19 AM Go to last post
  25. 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 04:33 AM
    • Replies: 2
    • Views: 1,544
    10-21-2015, 10:24 AM Go to last post
  26. 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 12:34 PM
    • Replies: 3
    • Views: 2,043
    10-14-2015, 03:56 PM Go to last post
  27. 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 07:28 AM
    logistic regression, prediction, regression
    • Replies: 0
    • Views: 1,154
    10-13-2015, 07:28 AM Go to last post
  28. 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 05:39 AM
    • Replies: 1
    • Views: 2,108
    10-03-2015, 06:10 AM Go to last post
  29. 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 04:14 PM
    • Replies: 1
    • Views: 1,206
    10-03-2015, 04:21 AM Go to last post
  30. 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 01:40 PM
    8 Pages
    1 2 3 ... 8
    • Replies: 114
    • Views: 17,635
    09-30-2015, 01:09 PM Go to last post
  31. 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 11:24 AM
    logistic regression
    • Replies: 4
    • Views: 1,700
    09-29-2015, 07:58 AM Go to last post
  32. 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 12:49 PM
    arima, forecasting
    • Replies: 7
    • Views: 3,294
    09-25-2015, 01:31 PM Go to last post
  33. 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 12:25 PM
    • Replies: 4
    • Views: 1,803
    09-24-2015, 01:34 PM Go to last post
  34. 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 06:49 AM
    • Replies: 2
    • Views: 1,951
    09-16-2015, 07:34 AM Go to last post
  35. 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 04:28 AM
    dfm, dynamic factor models, time series, time series analysis, time series regression
    • Replies: 6
    • Views: 2,499
    09-14-2015, 04:33 PM Go to last post
  36. 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 06:41 AM
    • Replies: 0
    • Views: 1,135
    09-14-2015, 06:41 AM Go to last post
  37. 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 01:09 AM
    • Replies: 5
    • Views: 3,710
    09-13-2015, 10:09 PM Go to last post
  38. conditional distribution functions.


    Started by wmjs2‎, 09-13-2015 12:58 AM
    conditional distribution, poisson
    • Replies: 0
    • Views: 2,502
    09-13-2015, 12:58 AM Go to last post
  39. 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 03:30 PM
    • Replies: 7
    • Views: 1,855
    09-11-2015, 07:43 PM Go to last post
  40. 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 05:43 AM
    • Replies: 3
    • Views: 3,511
    09-05-2015, 12:53 PM Go to last post
  41. Egarch

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

    Started by nonso‎, 09-04-2015 07:05 AM
    • Replies: 0
    • Views: 1,508
    09-04-2015, 07:05 AM Go to last post
  42. 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 03:46 AM
    atkinson, excel, formula, inequality
    • Replies: 2
    • Views: 4,223
    08-30-2015, 05:07 PM Go to last post
  43. 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 04:03 AM
    • Replies: 0
    • Views: 933
    08-27-2015, 04:03 AM Go to last post
  44. 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 12:28 PM
    • Replies: 6
    • Views: 1,145
    08-26-2015, 01:04 PM Go to last post
  45. 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 10:56 AM
    standard deviation
    • Replies: 0
    • Views: 1,639
    08-23-2015, 10:56 AM Go to last post
  46. 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 08:25 AM
    power calculation, probability, sample size, statistical significance
    • Replies: 1
    • Views: 2,801
    08-19-2015, 09:03 AM Go to last post
  47. 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 11:28 AM
    • Replies: 8
    • Views: 1,711
    08-18-2015, 02:05 PM Go to last post
  48. [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 12:36 PM
    • Replies: 0
    • Views: 1,048
    08-18-2015, 12:36 PM Go to last post
  49. 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 10:58 AM
    nonparametric rm?
    • Replies: 1
    • Views: 1,028
    08-18-2015, 02:09 AM Go to last post
  50. 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: 1,207
    08-17-2015, 07:33 AM Go to last post
  51. 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 01:36 PM
    • Replies: 8
    • Views: 1,330
    08-13-2015, 11:06 AM Go to last post
  52. 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 08:42 AM
    • Replies: 3
    • Views: 1,779
    08-13-2015, 03:27 AM Go to last post
  53. 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 05:21 PM
    • Replies: 5
    • Views: 1,788
    08-12-2015, 08:51 PM Go to last post
  54. 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 03:54 PM
    empirical bayes, empirical bayes method, estimators, parameter estimation, poisson-gamma model
    • Replies: 0
    • Views: 1,310
    08-12-2015, 03:54 PM Go to last post
  55. 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 08:27 AM
    • Replies: 8
    • Views: 1,885
    08-11-2015, 03:54 PM Go to last post
  56. 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 01:42 PM
    • Replies: 5
    • Views: 1,867
    08-11-2015, 04:43 AM Go to last post
  57. 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 11:44 AM
    brier score, odds, prediction
    • Replies: 2
    • Views: 1,982
    08-10-2015, 02:17 PM Go to last post
  58. 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 12:12 PM
    • Replies: 0
    • Views: 1,616
    08-10-2015, 12:12 PM Go to last post
  59. 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 08:13 AM
    • Replies: 5
    • Views: 1,208
    08-10-2015, 10:24 AM Go to last post
  60. 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 01:21 PM
    • Replies: 3
    • Views: 1,293
    08-05-2015, 02:40 PM Go to last post

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