1. Announcement:
05-10-2017
Views:
2,807
Page 1 of 26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ... Last
Threads 1 to 60 of 1509

# Forum: Applied Statistics

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

1. ### 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...

• Replies: 114
• Views: 17,603
09-30-2015, 01:09 PM
2. ### Logit v. Probit: A fight to the death

Every now and then I have to work with binary responses with continuous covariates. So of course this screams generalized linear model. The...

• Replies: 67
• Views: 38,640
04-08-2015, 12:47 PM
3. ### Control chart for spending over time.

I am running a control chart for spending over time (there are about 80 data points, one per month for the last 80 months). Is there one type of...

• Replies: 54
• Views: 11,900
05-13-2016, 11:12 AM
4. ### Linearity

A key issue for me is to determine if my data is non-linear and determine ways to make it linear if possible. An approach that looks promising to me...

• Replies: 47
• Views: 11,500
10-05-2014, 09:24 PM
5. ### Determanistic vs Stochastic trend

Trends may be either determanistic or stochastic in nature and assuming one is the other causes both forecasting and other errors. The trick is...

• Replies: 45
• Views: 10,451
12-03-2013, 12:12 PM
6. ### 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...

• Replies: 44
• Views: 5,353
09-05-2017, 01:11 PM
7. ### 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...

• Replies: 43
• Views: 11,877
04-01-2017, 11:50 PM
8. ### 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...

• Replies: 41
• Views: 7,788
01-12-2016, 02:44 PM
9. ### First "big data" (not so big) project... lots of missing data!

Hello! So, as I’ve shared before here in the forum my boss switched me from the project I was working on to my first “big data” problem. I’m adding...

• Replies: 32
• Views: 3,313
02-18-2016, 05:47 PM
10. ### Simulations

I mean this to be a general thread on simulation but will start with a specific point. The following I know is a trivial example, CI are well...

• Replies: 30
• Views: 8,816
01-09-2015, 03:36 PM
11. ### Non-parametric methods

A book I am reading now on non-parametrics argues that t test may be still accurate in large sample sizes even if the distribution assumptions are...

• Replies: 27
• Views: 5,076
08-19-2014, 09:14 AM
12. ### Missing data in regression

I have an entire population. One of the variable is missing about 12 percent of the data. I believe this is because we have no finished collecting...

• Replies: 27
• Views: 8,871
10-05-2016, 08:57 AM
13. ### 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...

• Replies: 26
• Views: 211,596
02-23-2017, 10:18 AM
14. ### Best Practice Time Series Analysis

Hello, I have got a general question. Should trend models like y(t)= b(0)+ b(1)*t y(t)= b(0)+ b(1)*t+ b(2)* t^2 y(t)= b(0)* exp in case...

• Replies: 24
• Views: 5,686
05-18-2015, 11:16 AM
15. ### 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...

• Replies: 24
• Views: 8,400
02-22-2017, 03:15 PM
16. ### What is Hierarchial Linear Regression used for?

This is associated with multilvel analysis. I am considering taking a course considered doctoral in this in the spring and I was hoping to get a...

• Replies: 23
• Views: 6,273
11-18-2011, 01:48 PM
17. ### Help with decision tree when continuous data

Hello, I have a dataset (y = true/false, x's = combination of binary and continuous data columns, n = 5000) that I am attempting to create a...

• Replies: 22
• Views: 4,844
02-24-2014, 10:55 PM
18. ### White standard errors

Some call these heteroscedastic consistent standard errors. There were some indications that my model was heteroscedastic :( Certainly my data is...

• Replies: 21
• Views: 3,567
03-10-2016, 06:48 PM
19. ### one million new (mac) jobs!

Is there an analysis of the new jobs we hear about by hourly pay? That's so we have an idea of the quality and so we don't get fooled by the govt.

• Replies: 20
• Views: 5,063
07-08-2013, 01:53 PM
20. ### Bayes?

Hi All, My question is: Where to go with Bayes?

• Replies: 19
• Views: 6,626
12-05-2011, 06:45 PM
21. ### Stats Problem

On average, there are three misprints in every 10 pages of a particular book. If every chappter of the book contains 35 pages, what is the...

• Replies: 18
• Views: 4,634
05-03-2012, 01:45 AM
22. ### beta distribution

Alpha and beta are two parameters that jointly determine the shape of a beta distribution. So far I have not found a good discussion of what these...

• Replies: 18
• Views: 3,578
10-01-2014, 04:41 PM
23. ### Population and P values

I have been told that if you have the entire population of interest than the P values and test of significance really are meaningless . They say...

• Replies: 18
• Views: 3,367
03-14-2016, 05:26 PM
24. ### Real world measurement at the limits of the measuring device

Hi everyone. I'm *not* a statisticion by any means, but I want to, if reasonable to do so, apply control chart methods to help solve a real world...

• Replies: 17
• Views: 4,918
08-08-2013, 07:42 AM
25. ### Control Chart - Which one to use - IMR or CUSUM

Hi, I have a thesis study about statistical quality control. I have data from a chemical factory manufacturing powder paint. They want to use...

• Replies: 17
• Views: 4,023
05-31-2016, 08:23 AM
26. ### 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...

• Replies: 17
• Views: 1,105
06-28-2017, 02:31 PM
27. ### Time series questions

Eventually a ecometrician will wonder by:yup: Ostrom suggests a measure of model value. You divide the RMSE of your forcast, by the RMSE of...

• Replies: 16
• Views: 4,819
10-11-2013, 03:01 PM
28. ### 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...

• Replies: 16
• Views: 3,586
11-19-2015, 05:22 PM
29. ### Time Series and the CLT

Unfortunately I no longer have the book this is based on. I was wondering why exactly this is the case . Personally I don't think most analyst...

• Replies: 16
• Views: 3,087
05-01-2016, 11:31 AM
30. ### Comparing nonsignificant means

It seems like I see the following pattern occasionally in research papers. The author will report results for statistical tests and not be able to...

• Replies: 15
• Views: 6,579
08-24-2011, 04:14 PM
31. ### Physical Sub-Sampling in the Oil Industry

Greetings All. Newbie here with absolutely no experience with Applied Statistics and a real-world question. I have a 6 inch oil/water pipeline that...

• Replies: 15
• Views: 3,436
06-10-2013, 10:25 AM
32. ### European Social Survey -- income variable

If you have worked with the ESS and are familiar with the vagaries of the income variable, perhaps you can help me identify a solution to a specific...

• Replies: 15
• Views: 10,861
01-16-2015, 07:43 AM
33. ### Simple time series methods

I have played around with time series for a long time. Now I have to actually use them quickly. I would deeply appreciate suggestions for the...

• Replies: 15
• Views: 4,618
07-15-2013, 12:11 PM
34. ### [help] cobb douglas function

The following is an estimate of a Cobb Douglas production function. Output=34.87 +0.98 Labour +0.87Capital + 2.76 month R-sq=0.86 F=79.98 ...

• Replies: 15
• Views: 3,939
11-17-2013, 11:51 PM
35. ### Assumptions of time series

I believe, but am not certain, that time series methods which employ regression assume normality and equal error variance. Would you test for these...

• Replies: 15
• Views: 9,223
12-03-2013, 12:25 PM
36. ### Methods section- can I use the term inferential statistics if I dont have a sample

I am writing a report and need to write a very brief method section. I basically describe my sample (frequencies), some cross tabulations, and see...

• Replies: 15
• Views: 3,194
04-14-2015, 04:10 PM
37. ### What method is this?

This comes from a slide, it is all the information I have. They say they ran this: Traditional Ordinary Least Squares (OLS) methods. Fixed...

• Replies: 15
• Views: 2,985
02-04-2016, 04:55 PM
38. ### test of proportion

Even for me this is a basic question, but I am having a crisis of confidence about my knowledge of stats these days.... I am testing if there is a...

• Replies: 14
• Views: 2,908
11-21-2014, 01:05 PM
39. ### Outlier Analysis

Since I circled back to this topic I thought I would start a thread on it :) I tend to think of statistics as some form of pure math where things...

• Replies: 14
• Views: 2,144
01-25-2016, 12:54 PM
40. ### Decomposing total variance of profits into variance from loss and variance from gain

Hello, Consider the profit stream of a firm. This profit stream consists of losses and gains. Suppose that I am interested in investigating the...

• Replies: 13
• Views: 4,963
11-11-2011, 03:39 PM
41. ### VAR model

Hi , i need a help :) i conducted a VAR model using e-view program after choosing the suitable lag length i re estimate the VAR ,so i got ...

• Replies: 13
• Views: 3,477
06-13-2012, 02:28 PM
42. ### Time series

Hello! Can someone help me with this: Y=X^2+Z, X,Z~N(0,1), independent equally distributed. How can I find projection od Y on span{1,X,Z}?

• Replies: 13
• Views: 2,535
11-19-2013, 09:43 AM
43. ### 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...

• Replies: 13
• Views: 2,407
07-28-2014, 03:06 AM
44. ### SEM and normality

Been a while since I worked with SEM. This puzzled me as I thought multivariate normality, the normality of the residuals was what mattered in...

• Replies: 13
• Views: 3,706
03-31-2015, 08:11 AM
45. ### I need Help from Statisticians

Hi everyone, I have problem and need a solution from statisticians, I'm from Iraq, working in the water municipality, I have 150 water tank to...

• Replies: 13
• Views: 2,174
02-21-2016, 07:44 AM

Many multivariate time series require variables to be integrated of the same order . My question is what do you do if variables are not integrated of...

• Replies: 13
• Views: 5,919
01-04-2017, 01:15 AM

Page 1 of 26 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ... Last

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Note: when sorting by date, 'descending order' will show the newest results first.