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Threads 121 to 180 of 1508

Forum: Applied Statistics

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

1. [SOLVED] Classification problem

Hi, I just need a couple of pointers in the right direction. I have a water quality network of about 15 sites, of which we have three defined...

• Replies: 0
• Views: 2,651
12-05-2016, 01:10 AM
2. Regression with different subsamples of countries

I am trying to run a firm-level regression and am a bit confused with the results so I'd appreciate any comments. So the data is at the firm-year...

• Replies: 2
• Views: 3,403
12-03-2016, 05:08 PM
3. Cluster with unknown number of sampling units?

I work on survey data which are usually collected through muti-stage cluster sampling. I am used to seeing clusters as geographically defined groups...

• Replies: 0
• Views: 2,299
11-30-2016, 07:36 AM
4. How to quantify accuracy of responses to a question by multiple participants?

I am a medical doctor working on a small project and needed statistical advice. My statistical background is very basic. The project purpose is to...

• Replies: 0
• Views: 2,997
11-27-2016, 02:46 AM
5. [Financial Statistics] Having prob to answering question for forward price with bonds

Consider a long forward contract on a 5 year bond which is currently traded at a price RM900.00. The delivery price is RM910.00, the time to...

• Replies: 0
• Views: 3,001
11-24-2016, 03:14 PM
6. Interpreting interaction terms

Hi, I did an experiment with three different treatment groups. In addition to finding out whether the treatments were statistically significant, I...

• Replies: 3
• Views: 3,940
11-23-2016, 02:01 AM

Once more I try to understand things that I have failed to understand for nearly a decade... :p I am trying to analyze data where an X occurs now...

• Replies: 4
• Views: 3,511
11-18-2016, 10:58 PM
8. What do you do when you are not sure...

I often get asked to run things where some assumption is violated . Or a Y variable has 9 distinct levels, so neither linear nor logistic regression...

• Replies: 2
• Views: 3,572
11-18-2016, 03:17 PM
9. ARDL and Multilevel books

I need a good book on autoregressive distributed lag (ARDL) and separately on multilevel regression. Ideally ones with some comments on how to run it...

• Replies: 0
• Views: 2,900
11-18-2016, 11:42 AM

Hello. We are doing a study with the Autoregressive Distrubuted Lag Model in Stata. Is it possible to get a model with 0 lags(ADL(0,0))? That is,...

• Replies: 1
• Views: 3,515
11-16-2016, 10:14 AM
11. Simulating random samples that follow a particular distribution

Hi, I am making a software that simulates evolution in a large population of fish and need help adding randomness to the process. Basically, in...

• Replies: 1
• Views: 3,905
11-15-2016, 02:12 AM
12. Deciding by RMSE how many simulation results to use for a representative sample

So, I'm doing a brute force Monte Carlo simulation to vary certain parameters and running a model through a thermal computational test bed. At the...

• Replies: 0
• Views: 3,945
11-01-2016, 04:48 PM
13. t test and data transformation

Hi all, I hope this is the right place to post this question. We have two sets of data and we want to compare them. Both sets fail for normality...

• Replies: 9
• Views: 4,184
10-28-2016, 05:47 AM
14. Sampling Plan

Hi everybody, this is Gias and this is my first post, I really hope you can help. Here's my question. In the company I work for, people carry...

• Replies: 0
• Views: 2,325
10-27-2016, 03:13 AM
15. Loan equivalent to betting loses.

A bet has a large probability p of winning small amounts of money M, and a low probability (1-p) of losing a large amount L>M .p/(p-1) So, the...

• Replies: 1
• Views: 2,513
10-21-2016, 07:57 PM
16. Maximizing the probability of a user subsgribing given a price

So, I was assigned the task outlined below and I have no idea on how to start. I'm a beginner so bear with me. We have a distribution that...

• Replies: 1
• Views: 2,461
10-21-2016, 07:55 PM
17. Survey Assistance - how many top choices to pick

In a survey of a closed, small and defined population (i.e. small business company), each is asked to choose the top x number from a list of 12...

• Replies: 3
• Views: 3,223
10-17-2016, 04:08 PM
18. Measuring change over time- How to make measures from two datasets comparable?

Greetings!!! I'm interested in learning how students' academic skills change overtime, to what extent, and how college contributes to this. ...

• Replies: 1
• Views: 2,784
10-16-2016, 02:43 AM
19. Test if a Trend is statistically Significant

Hello, I am working with hospital data arranged in panel format over 4 years, something like this: ...

• Replies: 1
• Views: 2,381
10-15-2016, 11:26 PM
20. Z Test with unknown sample size

How would I conduct a z test when I don't have "n"? The instructor never went over what to do without an "n". It has always been provided. Please...

• Replies: 2
• Views: 3,001
10-15-2016, 08:38 PM
21. F test for different Weigthed Least Squares adjustemnts

Hello, I'like to check if variances from to differentes WLS adjustments arise from same population. Or maybe taken as equivalent. I use the F test...

• Replies: 1
• Views: 2,663
10-12-2016, 01:11 PM
22. Variance / Anova Questions

I have readings taken at 20 different positions for 3 different treatments ( x 3 reps). The mean for each treatment is different. I am not interested...

• Replies: 0
• Views: 2,217
10-12-2016, 12:47 PM
23. Non-Linear programming :)

Hi everyone So I am currently working on a non-linear model for my third year stats course & I need some help. I want to create a linking...

• Replies: 0
• Views: 2,775
10-11-2016, 05:16 AM
24. 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: 8,822
10-05-2016, 08:57 AM
25. mathematical model to build a ranking/ scoring system

I want to rank a set of sellers. Each seller is defined by parameters var1,var2,var3,var4...var20. I want to score each of the sellers. Currently...

• Replies: 1
• Views: 3,362
10-04-2016, 02:43 PM
26. Catastrohpe modeling and GLM

Has anyone used Catastrophe (CAT) modeling results as a response variable in the GLM ? (1) Is this theoretically correct ? In the layman's terms,...

• Replies: 0
• Views: 2,240
10-03-2016, 10:36 AM
27. Concordance per juror in listening tests

Hello, For the purpose of a university project I performed listening tests on a group of 10 jurors. They were evaluating the sounds with an A-B...

• Replies: 0
• Views: 2,561
09-29-2016, 04:12 AM
28. Causality test

Do you know what is the "Hafner and Herwartz" causality-in-variance test, or else called LM-GARCH? And how you run it on eviews (or gretl)? If...

• Replies: 0
• Views: 2,128
09-23-2016, 02:32 PM
29. Engineering research tests: comparing post hoc data and paring

Hello - I have several tests to do but my stats is a bit rusty... They are all based on the deflection of different beam designs: Test 1 Beam...

• Replies: 0
• Views: 3,326
09-21-2016, 11:18 AM
30. What statistical analysis (ordinal/nominal data)?

Hi. I'm seriously super frightened by statistics but as a PhD student, I guess it's time to learn... I have data from a survey comparing three...

• Replies: 2
• Views: 2,528
09-08-2016, 07:21 PM
31. Simple average question

This might be the most basic math question ever asked here :( I want to calculate a year to date (not monthly) average of cases per counselor. I...

• Replies: 1
• Views: 2,568
09-06-2016, 04:01 PM
32. Monte Carlo simulation

Hi :) I'm currently doing a third year university stats course. I need help with some questions. The question gives Wind speed and Temperature...

• Replies: 4
• Views: 3,164
09-04-2016, 12:03 PM
33. 2+ measures for one outcome possible?

Hey guys, I am currently designing a study which aims to investigate the effect of a treatment on several outcomes. Since some of the outcomes are...

• Replies: 0
• Views: 2,135
09-02-2016, 03:09 AM
34. Statistical Analysis of Student Test Scores before and after an Intervention

Hello, Please help me ensure that I am conducting the proper statistical analysis. I am trying to determine if my student test score results are...

• Replies: 3
• Views: 2,434
08-31-2016, 08:58 PM
35. looking at how income fluctuations and instability affect spending in certain areas

Hi, I am trying to figure out how to examine how the magnitude of a spike in funding affects spending in certain sectors. For example, an...

• Replies: 0
• Views: 2,164
08-31-2016, 09:36 AM
36. Seek for Statistical Test of Variability Contribution Percentage of Multiple Factors

Hi, I need statistical test which would tell me which percent of variability in dependent variable is from given independent set of variables and...

• Replies: 3
• Views: 2,648
08-15-2016, 07:36 AM
37. Can you help me use statistics to understand inventory at my company??

Hey everyone, I work for an industrial materials warehouse that stocks and sells probably 10,000 discreet items. I’m trying to figure out a way to...

• Replies: 1
• Views: 2,485
08-10-2016, 06:33 PM
38. Regression and seasonality

I am running a multiple linear regression analysis to show how different demand factors affect demand of juice. My independent variables are price,...

• Replies: 4
• Views: 2,551
08-08-2016, 09:20 PM
39. Weighted moving averages

I would like to learn about what I think are called weighted moving averages for some software I am working on. I need a way to estimate the...

• Replies: 2
• Views: 3,467
08-07-2016, 02:08 AM
40. Comparing Mean and Median

Hi, This is my first post here so I am sorry if this question seems a little basic or I have put it in the wrong section of the forum. I was...

• Replies: 3
• Views: 2,377
08-06-2016, 04:50 PM
41. Time Series Problems

Hello all, I need your advice regarding analysis I wish to perform. I have time series data, of a rate of some virtual stock. The time interval is...

• Replies: 0
• Views: 1,672
08-04-2016, 01:12 AM
42. What ANOVA fits best?

Dear all, can anyone please advice me which ANOVA is the most suitable: An athlete has perfromed multiple runs at constant speed with three...

• Replies: 6
• Views: 2,516
08-03-2016, 06:11 AM
43. Breusch-Godfrey

I am using the Breusch-Godfrey for autocorrelation, but I dont know how many lags should I use? I am testing seasonality of funds returns with...

• Replies: 0
• Views: 1,227
08-02-2016, 06:35 PM
44. Newey West autocorrelation

May I use Newey West procedures when exists only autocorrelation? or I just can use Newey West when exists both autocorrelation and...

• Replies: 2
• Views: 1,653
08-02-2016, 06:26 PM
45. Log transformation of means

Hey! I'm working on a meta-analysis and I want to use the means for moderator analysis. So some journal articles report log transformed values of...

• Replies: 1
• Views: 1,276
07-29-2016, 04:36 PM
46. Instrumental variables

Instrumental variables must not be correlated with the error term. How can you test if they are? The only way I can think of is testing their...

• Replies: 6
• Views: 2,367
Stu
07-25-2016, 01:14 PM
47. Classification System based on Statistical tests

Hello and Thanks I am looking at financial data (Revenue for Example) over a 5 year time frame and want to classify the data based on trends...

• Replies: 0
• Views: 1,612
07-17-2016, 04:58 PM
48. SDC Platinum Database

Hello everyone, Currently I'm doing research on whether implementation of open innovation in high technology industries makes a firm more crisis...

• Replies: 1
• Views: 1,417
07-12-2016, 09:34 AM
49. Aggregate versus individual data

As context for this we are working on creating models that predict economic factors such as increased income as result of being in our programs....

• Replies: 2
• Views: 1,103
07-11-2016, 05:23 PM
50. What does this regulation mean?

I would appreciate comments on this new federal regulation. I have no idea what they mean (no other context is provided). The only...

• Replies: 3
• Views: 1,744
07-11-2016, 01:46 PM
51. ANOVA for three different time periods

I have three different time periods of sales data of 4 weeks apiece: weeks 1-4, 5-8, and 9-12. During weeks, 9-12 we attempted a test that may...

• Replies: 4
• Views: 1,206
07-08-2016, 09:11 AM
52. Statistical test for algorithm performance

I am developing different algorithms for a class of optimization problems. I have several problem instances in this class (some from real...

• Replies: 0
• Views: 1,411
07-08-2016, 06:24 AM
53. Is a paired two sample for means t- test OK?

I am performing some method validation and need to compare results but am unsure which t-test to use. I am thinking paired would be OK but would...

• Replies: 1
• Views: 1,190
07-01-2016, 10:44 AM
54. Formula for prioritization

Hey guys, I hope you are all doing well. I have a quick question related to an applied research I need to make for my job. Basically, we have a...

• Replies: 0
• Views: 865
07-01-2016, 08:16 AM

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