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# Forum: Applied Statistics

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

1. ### Confidence Interval: for a historical return series?

Hello, I work in asset management, and I've been doing research on equity funds. I've pulled historical return and standard deviation data for...

• Replies: 0
• Views: 1,309
11-06-2013, 09:10 PM
2. ### Help with correlation methodology of ratio

I have not had to use my stats skills since college but am now in a position to do so and am now in a position where I need to. I have two...

• Replies: 2
• Views: 1,409
11-06-2013, 04:59 PM
3. ### Error for combining multiple binomial distributions

Lets say we have two processes and we want to know which has a higher success rate. So we do two sets of trials. process 1 gives 53 out of 606 and...

• Replies: 1
• Views: 1,320
11-06-2013, 02:54 AM
4. ### Trying to Determine the Likelihood of 2 Possible Outcomes Using Categories

Hi, I'm a little rusty on my statistics, and have been struggling to figure out a somewhat easy way to resolve my issue. I'm looking at data...

• Replies: 6
• Views: 1,630
11-05-2013, 04:46 PM
5. ### Judging bias in assessment system with multiple assessors & scoring criteria

I work for a grant giving charity and we use external assessors to help in our selection process. There are 30 applications for review. We have 6...

• Replies: 0
• Views: 1,733
11-05-2013, 11:01 AM
6. ### Logit regression to evaluate real price test

Dear statistically inclined people, I'm asking for your help in a real world price test evaluation. I've had two years of stats and econometrics...

• Replies: 1
• Views: 1,165
10-31-2013, 08:20 PM
7. ### Need help for classification problem

Hi, I'm trying to make an analysis but don't really know if what I have in mind makes sense and how to actually do it. So I have the following...

• Replies: 1
• Views: 1,051
10-31-2013, 07:54 PM
8. ### Mixed Model or Multiple General Linear Model?

Well I have not used a mixed model in a long time and seemed to be confused. The scenario is that I have data for 14 people for a continuous...

• Replies: 2
• Views: 2,116
10-30-2013, 10:49 AM
9. ### Percent Correct > Chance

Hey, quick question: I have response data (n=14) to a categorical quesiton with 5 potential answers that the respondent could have selected....

• Replies: 4
• Views: 2,513
10-28-2013, 08:57 PM
10. ### Searching for special methods

Hi, my goal is to analyse some data, but I do not know which method I should use. I gave some tasks to a large amount of students and they solve...

• Replies: 0
• Views: 1,665
10-27-2013, 12:49 PM
11. ### Need help - upper bound estimation

Hello! I am making my college conclusion project, and my deadline is dreadfully close! I need to find out a way to estimate a variable, and I have...

• Replies: 3
• Views: 1,740
10-26-2013, 12:12 AM
12. ### Choosing correct measures of statistical dispersion

Hi, I have question regarding choosing a measure of statistical dispersion. I have 20 different factories, where each factory consists of...

• Replies: 0
• Views: 1,473
10-25-2013, 02:40 AM
13. ### Significance testing for biserial correlation

Hi, I have run an analysis outlined below. It would be great if the group could tell me a) if this approach is appropriate and b) if the result is...

• Replies: 2
• Views: 2,076
10-24-2013, 09:49 AM
14. ### Financial (present value) question

Not a statistics question - but some do financial analysis here :p We calculate a benefit/cost ratio. Our cost occurs at the beginning of the...

• Replies: 0
• Views: 1,503
10-23-2013, 08:24 AM
15. ### Best Approach from Stat's Pro

Hey All, Looking for suggestions on how to approach this stats real-world problem. My company, Company B, gives out an award to one of 5...

• Replies: 1
• Views: 1,551
10-22-2013, 02:57 PM
16. ### (Economics) Transition matrices: transition rates, activity rate

Hello everyone... it's been a while. I have a question for the econometricians out there. I have active labor 1. I have the following...

• Replies: 0
• Views: 1,641
10-19-2013, 11:21 AM
17. ### using neural network to predict outcome

Hi all, I've been using a multilayer perceptron to build a classifiacation model in SPSS, and just need some help or direction on how to use the...

• Replies: 0
• Views: 1,589
10-18-2013, 11:27 PM
18. ### Interesting comments on diagnostic test

I found this interesting in part because it is different than the advice I have often encountered (which tends to move directly from a given...

• Replies: 0
• Views: 1,248
10-14-2013, 05:26 PM
19. ### Sample Size Determination for Binomial Distribution

How can I compute the minimum sample size for a binomial distribution? I'd like to perform a manual calculation as well as a calculation with the...

• Replies: 2
• Views: 1,486
10-13-2013, 07:32 PM
20. ### Power Law Distribution

Hi All, After reading some books on how stock market returns are better modelled by a power law distribution, I wanted to play with some data...

• Replies: 0
• Views: 1,736
10-12-2013, 08:19 PM
21. ### weighting for different channels of survey results

I'm not a statistician, but i'm looking at some customer satisfaction survey questions and how to best weight them. we have three channels of...

• Replies: 2
• Views: 1,826
10-12-2013, 07:10 AM
22. ### Determining Intercept Value from Probability

I just wanted to make sure I was not missing something. I have a probability for an intercept from a logistic model (probability = 0.56) and I want...

• Replies: 2
• Views: 1,255
10-11-2013, 08:31 PM
23. ### 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: 4,825
10-11-2013, 03:01 PM
24. ### Long feature list DOE

Hi! I want to test how the size of a list of features influence a response rate. So how to take into account the fact that influence may come not...

• Replies: 0
• Views: 1,525
10-10-2013, 05:47 AM
25. ### Basic log question for regression

This continues to elude me although it is very basic. You use logs to transform data for various reasons - notably to make the data linear and deal...

• Replies: 6
• Views: 1,375
10-08-2013, 02:17 PM
26. ### Need ideas for framework for relationship between time-based events and attrition

I'd like to be able to find a relationship between automatic problem reports and customer attrition in an online service. When a customer...

• Replies: 1
• Views: 1,419
10-08-2013, 08:43 AM
27. ### What methods to use...

Hi all! I've not carried out statistical work for a very long time. Last time was when I was uni 7 years ago. I've found myself finally needing it,...

• Replies: 8
• Views: 2,003
10-02-2013, 02:42 AM
28. ### do mean and median tend to converge as number of data points gets large?

A low median means the data points are congregated at the low end of a range and that would produce a low mean as well. Is there a principal that...

• Replies: 10
• Views: 6,110
09-30-2013, 11:06 AM
29. ### Calculating standard error for category from data for sub-groups

Hi, I have a large set of data along the lines of: Type 1  x1 number of runs, y1 number of failures Type 2  x2 number of runs, y2 number of...

• Replies: 1
• Views: 1,756
09-29-2013, 05:21 AM
30. ### percentage below mean in a given range of income?

Suppose I have a known number of people ("N") having a specified range of income (e.g. \$1 through \$1,000,000) and I know the mean income ("M") but...

• Replies: 2
• Views: 1,538
09-25-2013, 09:49 AM
31. ### Differences in time series modeling...

Some time series techniques stress addressing problems with standard errors caused by autocorrelation. For example Cochrane-Orcutt, Yule-Walker etc....

• Replies: 11
• Views: 2,986
09-24-2013, 01:01 PM
32. ### AR order

I know that you can use ARIMA to determine an AR order. But there is obviously a lot of subjectivity in that. Does anyone know other ways to...

• Replies: 3
• Views: 1,782
09-19-2013, 12:17 PM
33. ### Next weeks Net Sales Predictions using 5 years of data.

Hi all, First, i need to do this on a work computer that does not have Internet access and is locked down. It is using Linux with with the...

• Replies: 2
• Views: 1,653
09-18-2013, 10:56 AM
34. ### Correlation of Spatial Data

Hi, I have 2 data sets X1 and X2. Both data sets contain various entries of geo spatial data (latitude and longitude). X1= X2 is just like X1 but...

• Replies: 0
• Views: 1,479
09-18-2013, 02:49 AM
35. ### Various Applied Stats Questions

Hey guys, having some majorrr problems understanding some of these questions: 1)what's the difference between the regression estimates and the...

• Replies: 0
• Views: 1,183
09-13-2013, 11:44 PM
36. ### small volume time series forecasting

hi everyone, I'm doing forecasting for hospital monthly patient volume. For large hospitals, ARIMA model works well; but for small...

• Replies: 0
• Views: 1,090
09-13-2013, 10:15 PM
37. ### Comparison of time series

I have two time series. The first is from a set of reports that have been used to guide policies. The method used to produce those reports is...

• Replies: 1
• Views: 2,128
09-13-2013, 08:26 PM
38. ### behavioral intent

Dear Forum, I'm looking for advice on how to validate a measure of behavioral intent. here's a simplified example: let's say that I did a study...

• Replies: 0
• Views: 1,156
09-12-2013, 02:32 PM
39. ### Responses that are close but not correct

I have a test, subjects completed the test. The test asks very specific questions and has categorical responses. The responses are a series of number...

• Replies: 0
• Views: 1,570
09-12-2013, 10:00 AM
40. ### Drivers of Firm Growth - Panel Data Analysis - Fixed (Within) vs. Between

Dear all, first of all hi to you all, it's my first time being here. Some really confusing problem finally got me here after reading loads of...

• Replies: 0
• Views: 2,058
09-12-2013, 04:31 AM
41. ### I am not sure if one can do this?

I have a list of 69 Clients and a list of 40 Employees. I also have a total of billable hours that these 40 employees will charge at the end of a 40...

• Replies: 0
• Views: 1,455
09-09-2013, 06:14 PM
42. ### Money and Risk Management in Forex

Hello all! I'm barely jumping into the Forex Market, and I somewhat understand the concept of being a winner long term, but I want to actually see...

• Replies: 4
• Views: 1,833
09-05-2013, 03:33 PM
43. ### Interpreting dummy variables

I am interested in how a categorical variable varied on a pre and post test. I operationalize the DV as change from the pre to post test. Then I...

• Replies: 2
• Views: 1,545
09-05-2013, 11:57 AM
44. ### How to Compare three Data Series Collected by different means?

I need to compare three different data series. The subject of the data is the same, but the collection method is different. My initial approach...

• Replies: 3
• Views: 1,836
09-05-2013, 08:41 AM
45. ### Tailed linear regression - Interpretation

Dear all, I would appreciate a lot if you could help me. I donīt know exactly if it is possible to Interpret correctly with the following results...

• Replies: 5
• Views: 1,994
09-04-2013, 11:25 AM
46. ### Augmented Dickey Fuller (ADF)

There are three ways to do this, without an intercept, with it, and with a trend. It is not clear to me how you tell which to use for a given time...

• Replies: 0
• Views: 1,927
08-30-2013, 12:51 PM
47. ### Terms

This comes from time series although I think it is mean to be general. I am somewhat confused by the difference in bias and consistancy as used here....

• Replies: 11
• Views: 2,043
08-28-2013, 03:48 PM
48. ### ANOVA interpretation

I need help in interpreting some ANOVA results with 2 factors (genotypes and treatment). Each group was treated with saline then an hour later...

• Replies: 2
• Views: 2,549
08-28-2013, 03:05 PM
49. ### Autoregressive distributed lag model (ADL)

I have started to work with these to predict variables who's relationship may be changing over time (likely they are, but we don't know). I have...

• Replies: 8
• Views: 7,228
08-27-2013, 10:14 PM
50. ### How to use LASSO with common shocks (economic factors)

I am trying to use LASSO for variable selection, on a balanced panel. I have a total of 14 predictors, and would like to reduce this variable space....

• Replies: 1
• Views: 1,696
08-27-2013, 10:01 AM
51. ### Ranges of Linear Regression data

I have a linear regression of a symptom (fatigue) vs iodine that does not show much correlation but the fatigue max symptom at different intervals...

• Replies: 5
• Views: 2,853
08-24-2013, 10:22 AM
52. ### Statistical methods for studying symptom vs drug level in single case study.

What are most useful statistical methods for studying a single case study where an individual tracks for a few years symptom over time that varies up...

• Replies: 2
• Views: 1,410
08-23-2013, 09:25 PM
53. ### Test to apply for forecast results from a multivariate regression

Hello everyone, My project is about the LIBOR rates (similar for the short term interest rates) It was known to be manipulated by Barclay's and...

• Replies: 1
• Views: 1,424
08-21-2013, 10:04 AM

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