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# Forum: Applied Statistics

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

1. ### Compounding Annual Growth

I'm working on a project for work involving data for the entire year of 2006. The data is currently broken out by monthly totals and the month/month...

• Replies: 0
• Views: 3,241
01-12-2007, 12:28 PM
2. ### A textbook of Time Series Analysis

I obtained a Bachelor Degree in Statistics in 1988. I was separated form this profession for more than 17 years because I was exercising Information...

• Replies: 8
• Views: 9,222
05-16-2008, 02:58 PM
3. ### Question on financial Beta

I've got a question on Beta as it's used in the financial community (covariance of a particular stock with its underlying index, divided by the...

• Replies: 2
• Views: 6,044
06-23-2008, 03:06 PM
4. ### Help with Analyzing Stocks

I'm working on a project for school and need help! What I am trying to do is create a regression channel for the stock market. The data I have to...

• Replies: 4
• Views: 5,172
12-15-2008, 10:15 PM
5. ### Regress Prices or Returns?

Hey there, I've just started a new job and have been asked to take a look at the historical correlation of the spot gold price with the spot...

• Replies: 1
• Views: 9,114
11-11-2009, 01:07 AM
6. ### Multiple Regression for Compensation Planning

I have very little statistics experience, so what I am about to ask may actually be a very simple question, but it is driving me crazy. I am...

• Replies: 3
• Views: 4,132
01-04-2010, 04:00 PM
7. ### Mortality table for water heaters

I would like to use this sample to answer the question: given that your water heater has lasted X years, you have a 50-50 chance of it lasting until...

• Replies: 9
• Views: 4,031
02-02-2010, 09:52 PM
8. ### Logistic Regression

Hello, I have a couple of questions on logistic regression: 1. In the stepwise procedure, I have two predictor variables --> one variable, X,...

• Replies: 0
• Views: 2,822
02-16-2010, 01:50 PM
9. ### correlation coefficient and slope

Hi, I am not a statistics guy but I need some help understanding something. Looking at this page -...

• Replies: 1
• Views: 5,204
02-19-2010, 12:55 PM

Anyone who could direct to papers written on the subject? I am interested in a research project to analyse these frequently published data (by the...

• Replies: 1
• Views: 2,954
02-20-2010, 03:16 PM
11. ### Decision errors and sample sizes (VSP)

Hello Please be gentle with me, I'm not a statistician, but I am struggling to understand the following problems which crop up in my work. I'm...

• Replies: 0
• Views: 2,336
02-22-2010, 04:55 PM
12. ### Intraclass Correlation for test retest

I have a problem with reproducibility assessment. I am measuring the amount of scar tissue in hearts by 7 different methods. There is no...

• Replies: 0
• Views: 3,495
02-23-2010, 02:04 PM
13. ### Questionnaire data with multiple categories.. urgent!

Hey, I have the following issue by using SPSS analyzing my data of a questionnaire: I have 16 questions (7point likert scale, with 4 categories...

• Replies: 0
• Views: 2,920
02-28-2010, 08:01 AM
14. ### Assembly time for IKEA furniture

Their furniture units have a number of wooden panels & pieces NP and a number of fasteners NF. If I assemble two units of furniture in times X and...

• Replies: 4
• Views: 9,712
03-18-2010, 08:28 AM
15. ### Natural Neighbour Interpolation

My problem concerns the application of Natural Neighbour Interpolation (NNI) to point data in the creation of a surface. The algorithm was first...

• Replies: 0
• Views: 5,340
04-06-2010, 03:33 PM
16. ### ANOVA or ANCOVA - how to standardize for body size

Hi everyone, I have a set of data for several species of animals that range in size. Is it appropriate for me to standardize my dependent...

• Replies: 1
• Views: 3,165
04-13-2010, 07:08 PM
17. ### Standard deviation question

Hello, I have 3 replicates from an experiment and i would like to calculate their standard deviation; however, each of the replicates is itself an...

• Replies: 1
• Views: 2,874
04-18-2010, 11:08 AM
18. ### Manova

Hi folks, First off, I have no training or education in statistics, so my knowledge thereof is fairly limited. I've been reading quite intensely...

• Replies: 0
• Views: 3,333
04-18-2010, 11:28 AM
19. ### panel data and price effect

Hi, I am using a panel data (N firms are observed over T years). My dependent is the gross-margin and I would like to estimate the impact of...

• Replies: 0
• Views: 2,795
05-03-2010, 05:41 AM
20. ### Maximum Likelihood Estimation Stata

Hey, i have a dataset with three variables x1, x2 and x3. I want to estimate (b0...b9) from a translog relationship T(x1,x2,x3)=0 where T is: b0...

• Replies: 0
• Views: 3,398
05-05-2010, 06:45 AM
21. ### Looking to hire a modeler/programmer

Looking to hire a modeler/programmer with a stong statistical background. Email at sports1970@hushmail.com

• Replies: 0
• Views: 2,543
05-06-2010, 12:42 AM
22. ### Finance: best way of replicating a series using regressions

Hello, I have approximately 50 series of foreign currency rates, many of which are fairly highly correlated. For each one, I want to find the...

• Replies: 2
• Views: 3,436
Axl
05-06-2010, 07:40 PM
23. ### repeated ANOVA 3, correlation between sd and mean = problem ?

hi all, here the problem : I have 16 experimental conditions (3 factors => 4*2*2 lvl) and 14 subjects (n=14). dependent variable = reaction...

• Replies: 0
• Views: 2,424
05-12-2010, 07:26 AM
24. ### proper distance in cluster with factor variable

Dear colleagues. I have a group of variables, all of them evaluated from 1 to 5. I want to group the samples with cluster analysis. From different...

• Replies: 0
• Views: 2,294
05-21-2010, 05:24 AM
25. ### Generate new image from principal components of many images

Hey everyone. I'm having a bit of difficulty with a neuroscience course - it's about the primary visual cortex. I have a bunch of image patches...

• Replies: 0
• Views: 2,856
05-21-2010, 08:18 PM
26. ### analyzing time series temp data

I know some statistics but this is beyond me. I have a set of temperature measurements that were recorded at set intervals. When a certain condition...

• Replies: 2
• Views: 3,332
05-22-2010, 09:45 PM
27. ### std error of multiple dummy regression

Hello, I've run some multiple regression on R. The indepensent variables are all dummies plus an intercept. The results are good, and I've noted...

• Replies: 1
• Views: 2,707
06-02-2010, 12:01 PM
28. ### Standardizing by a mean?

Greetings all, I have been approached by a colleague with what appears to me to be a tricky question. I'll try to be as succinct as possible: They...

• Replies: 2
• Views: 3,512
06-02-2010, 02:42 PM
29. ### Confused about multifactorial design of proportions

Dear all, I was given to evaluate data which consists of proportions, categorized in several groups. Different individuals had to make certain...

• Replies: 1
• Views: 3,955
06-03-2010, 02:35 PM
30. ### Comparing lower and upper quartiles while adjusting for covariates (Public Health)

Hi Everyone - I am new to Talk Stats and grateful for the help. I am working on a public health project and trying to assess the degree to which...

• Replies: 1
• Views: 5,370
06-04-2010, 04:14 PM
31. ### Help with economics question

Hi, first time user. I am having trouble with a question and I just wanted some hints/pointers as to how to solve it. Suppose you have a...

• Replies: 1
• Views: 2,666
06-16-2010, 02:57 PM
32. ### financial return/coefficient of variation

I am moving this question to this forum from the general statistics one because I just realized this forum covers finance. I would greatly...

• Replies: 2
• Views: 8,637
06-16-2010, 03:07 PM
33. ### writing anova results for a paper

Hi all, It is first time that I am trying to write a scientific paper based on statistical analysis and i am a bit confused. The results from...

• Replies: 3
• Views: 7,912
06-17-2010, 07:37 PM
34. ### Drawing PCA

After doing factor analysis in SPSS, I have got a component matrix showing 6 components on the top row and all variables on the leftmost column. How...

• Replies: 3
• Views: 4,187
06-20-2010, 10:14 AM
35. ### Standard Deviation - Daily vs Monthly

Hi community, I was wondering if you might help me with some Standard Deviation calcs. Apologies in advance if the questions are very basic. I'm...

• Replies: 1
• Views: 7,010
06-21-2010, 09:02 AM
36. ### sample size for medical statistics?

Hello! I hope I'm posting in the right place.. I'm doing a research in biomedicine for my bachelor's degree (testing how many embolus a machine...

• Replies: 2
• Views: 5,343
06-23-2010, 05:46 PM
37. ### Before and After Statistical Significance

Hey, I was wondering how to do before and after statistics to show significance in the aftermath of a process. The situation is that we are...

• Replies: 3
• Views: 14,338
06-24-2010, 12:39 PM
38. ### Fitting a distribution to summary data?

I've been presented with tables of data giving the lengths of infants at various ages, and I'm asked to develop a website application that will...

• Replies: 0
• Views: 4,979
06-26-2010, 09:00 AM
39. ### A proper statistical test needed!

Dear my friends, I am a computer science student, and I have a set of data. My data is divided in two groups (size of each group: n1=3928 and...

• Replies: 1
• Views: 3,647
06-26-2010, 09:51 AM
40. ### what to do after a chi² test

hey, i compared the frequency of samples containing zero pupa vs samples containing at least one pupa in different stations. i carried out a chi²...

• Replies: 3
• Views: 144,826
06-26-2010, 12:49 PM
41. ### Exact p-value conflict with exact 95% confidence interval

Dear all, How would you interpret a situation where Pearson's exact p-value is 0.01, but the exact confidence interval for the risk ratio embraces...

• Replies: 6
• Views: 8,078
06-28-2010, 05:43 AM
42. ### block of missing demographic info

I am conducting hierarchical regression on a sample of 380, which is made up of respondents from 6 organizations. Due to a communication error, none...

• Replies: 1
• Views: 3,145
06-28-2010, 06:56 PM
43. ### Multivariate data analysis

Hello, I work as an data analyst at a company that develops gas sensors. Gas sensors can be tricky and to get as good sensor as possible we are...

• Replies: 1
• Views: 2,223
06-29-2010, 04:59 PM
44. ### t(75)=2.75

I come across the following while reading the literature. I don't understand the meaning of it, particularly t(some number). "For both accuracy...

• Replies: 2
• Views: 2,705
07-02-2010, 06:43 AM
45. ### Multiple regression

To arrive at the relative weights of four variables in their contribution to satisfaction with an appraisal system, I used multiple regression. The...

• Replies: 1
• Views: 2,215
07-03-2010, 01:49 PM
46. ### Repeated-measures ANOVA and correlated variables

Hello everyone, To analyze the results of an experience for my master's thesis (at the crossroads between business and social sciences), I believe...

• Replies: 1
• Views: 4,067
07-04-2010, 06:08 PM
47. ### Correct form of likelihood function for data which has only an upper or lower bound

(i.e. say we have done some experiments and a negative result was found, ruling out values for some physical quantity below(above) some limit defined...

• Replies: 3
• Views: 4,040
07-06-2010, 10:09 PM
48. ### Significance in 3d graphs

hi all, I have a problem: I have to compare two 3D bar graphs. I have a total of 36 bars in a grid of 6x6. I need to know if each bar is...

• Replies: 2
• Views: 3,248
07-06-2010, 11:20 PM
49. ### chi square problem.

hi all: I tried google and the search function on this forum with no luck. I did the following experiment: Differentiate a stem cell into four...

• Replies: 2
• Views: 3,268
07-06-2010, 11:48 PM
50. ### One way ANOVAs or Two way ANOVA?

Hello... I am new here but I am hoping you all can shed some light on a question I have. I am not sure how to best analyze my data... hopefully I...

• Replies: 8
• Views: 14,922
07-08-2010, 10:12 AM
51. ### kappa when number of events is not predetermined

Hi, I want to use kappa to assess intraobserver reliability when counting agressions between pigs. Two observers watch videorecording of pigs...

• Replies: 0
• Views: 2,612
07-12-2010, 01:25 PM
52. ### correlations when observations are not independant

I have a dataset with 100 cows, 10 days per cow and feeding time and rumination time for each hour. We want to prove that feeding time of each hour...

• Replies: 0
• Views: 2,384
07-12-2010, 01:26 PM
53. ### Fisher's LSD in Systat10

I have a multivariate data as detailed following. There are 3 group of plants; each group has five plants (biological replicates). I have quantities...

• Replies: 0
• Views: 3,780
07-13-2010, 03:57 AM
54. ### From EFA/CPF to advice

For my graduation thesis I am doing research into Innovation. I have used a questionnaire (5 point Likert scale) to collect data from about 60...

• Replies: 0
• Views: 2,263
07-13-2010, 04:31 AM
55. ### Comparing matrices without a Mantel Test

Hello everyone, I am a biologist at a University and have stumbled across an interesting problem. My data is organized into matrices. The matrices...

• Replies: 7
• Views: 7,122
07-13-2010, 06:04 PM
56. ### SPSS Confussion, what test

Hi there, We (my girlfriend and myself) are trying to work out a methodology/test we can run on the load of data that she has collated. ...

• Replies: 4
• Views: 3,795
07-14-2010, 05:32 PM
57. ### Accruracy

Hello, I am not quite sure if the title is right or not but here it goes. I am doing an internship at a manufacturing facility where I am working in...

• Replies: 5
• Views: 3,397
07-14-2010, 06:58 PM

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