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# Forum: Applied Statistics

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

1. ### Could you take a look at this please? Feedback wanted.

(There was a question and a link to a draft tutorial here.) UPDATE: Hi again. I received feedback. Many thanks. Will go ahead and produce the...

• Replies: 0
• Views: 1,354
06-05-2013, 04:01 PM
2. ### Simple Calculation

I could use a little, help. I was reviewing an article that gave a basic recommendation for the resampling number for bootstrapping (number of...

• Replies: 2
• Views: 1,818
BGM
06-04-2013, 03:19 PM
3. ### Suggested readings for non-linear regression

I have not worked much with non-linear or robust regression, but am trying to learn it. Any suggestion for articles, books, or links to read.

• Replies: 2
• Views: 1,524
05-30-2013, 02:54 PM
4. ### Missing at Random

I have a large dataset where I am calculating a time measurement from two events with many immediate events in between them. Moreover, there are many...

• Replies: 1
• Views: 1,817
05-30-2013, 10:36 AM
5. ### Time series analysis of causes of congestion

Hello, I have tried to find a post on the forum which covers this topic so apologies if this question has already been answered. I am wanting...

• Replies: 1
• Views: 1,837
05-28-2013, 06:56 AM
6. ### Significant and not significant depending on the test. What to trust?

Hi. I'm a PhD student in the field of Bioengineering (sorry in advance for my poor english, btw). I'm analyzing some data to be included in a...

• Replies: 3
• Views: 1,956
05-28-2013, 02:33 AM
7. ### what are contrasts?

Hi, I am doing homework for an assignment in statistics. I cannot get my mind up for what contrasts are. Anyone can explain that in simple words? ...

• Replies: 5
• Views: 2,160
05-23-2013, 03:30 PM
8. ### Determining the power of a 2-Sample T-Test

So I am running a two-sample t-test , and wanted to set some preliminary accuracy goals. Ideally, I wanted to end the test when there was a...

• Replies: 7
• Views: 2,886
05-21-2013, 04:47 PM
9. ### Business Intelligence / Reporting for website - Percentiles and comparability

Hey guys, I am currently facing some difficulty with my Bachelor's thesis, as I lack the proper quantitative skills to solve a problem on my own:...

• Replies: 0
• Views: 1,346
05-20-2013, 10:02 PM
10. ### Statistics for surveys

We generate surveys where we ask our customers about the quality of service provided. Responses are likert scale commonly (strongly agree, agree...

• Replies: 1
• Views: 1,154
05-20-2013, 11:27 AM
11. ### Newbie to stats - comparing pre & post test results with missing data

Hi I'm a complete beginner to stats and I can't work out how I can analyse some data with SPSS despite it being very simple on the surface. I...

• Replies: 2
• Views: 2,442
05-18-2013, 03:39 AM
12. ### How would I determine significant factors for a conditional drop?

Hi, I have a financial data set of company-specific financial returns post a recurring event. I am interested in determining which factors would...

• Replies: 0
• Views: 2,043
05-16-2013, 06:09 PM
13. ### Econometrics question

Econometrics question: http://i.imgur.com/dCHdGnm.png I would like to check that my answers are correct: for a. I wrote that it would be a DF test...

• Replies: 0
• Views: 2,374
05-16-2013, 05:02 AM
14. ### Probability Distribution of a Subset

I was wondering, if you have a set with data that follows a certain probability distribution, will the subset have that same distribution? Lately...

• Replies: 7
• Views: 4,510
05-11-2013, 04:59 AM
15. ### Multiple response variable missing

If I have a multiple response variable and none of the categories is checked, the subject should be coded as missing right? EX Race RWhite...

• Replies: 7
• Views: 2,110
05-08-2013, 12:17 PM
16. ### repeated analysis

Hi my friends my dependent variable Y is measured for 5 years and had value 0 or 1 ( for five year the dependent variable is 1 or 0 not for each...

• Replies: 2
• Views: 1,315
04-29-2013, 10:23 PM
17. ### Sales modelling

Hello everyone, First of all I have to apologize about how little I remember those statistics lessons from my study time. So try to be...

• Replies: 1
• Views: 1,465
04-27-2013, 08:53 PM

Hi Everybody, I know this is a long shot, but I need to start somewhere. I am wanting to use facebook data as part of my dissertation... the only...

• Replies: 2
• Views: 1,884
04-27-2013, 04:12 PM
19. ### Distributions for sales

Hi, I have a problem that I just cannot find a solution to. What type of distribution would salaries follow in, for example, the US? I would be...

• Replies: 0
• Views: 1,156
04-27-2013, 12:47 PM
20. ### missing (aid disbursements) data: some questions

hello to you all i have some questions concerning how to treat missing data in my specific case (i am currently writing my bachelor thesis in...

• Replies: 2
• Views: 2,383
04-21-2013, 08:41 PM
21. ### disaster incidents, the role of statisticians

I'm curious about the role statisticians are playing in, for example, the investigation of the recent incident in Boston. Any one have insight? or...

• Replies: 1
• Views: 1,428
04-19-2013, 08:40 PM
22. ### sports, finish times, world records, course records

Anyone here working with sports data? Out of personal curiosity, I am interested in reading published analyses that assess the extent to which a new...

• Replies: 0
• Views: 1,474
04-19-2013, 06:38 PM
23. ### Finance: Question about two-sample Kolmogorov-Smirnov Test

Hi I have two time series of market returns and I would like to test whether they are from the same distribution by using the Kolmogorov-Smirnov...

• Replies: 4
• Views: 3,779
04-19-2013, 06:27 PM
24. ### Winsorizing Panel data (eliminating outlier overall or across firms)

We have a panel data consisting of about 1000 firms with each about 150 monthly observations (Returns and distress measures such as Z-score). In...

• Replies: 0
• Views: 2,963
04-14-2013, 03:40 AM
25. ### problems with summation notation :(

hello everyone! i'm having a little bit of trouble with following a chain of identities using double-summation. i hope someone who's more...

• Replies: 2
• Views: 1,807
04-11-2013, 03:01 PM
26. ### Distance-based redundancy and 2-way repeated measures ANOVA

I have data that consists of three different treatments (A, B, and C) on 22 patients (A:8, B:8, C:6). Measurements of bacterial composition were...

• Replies: 0
• Views: 1,454
04-11-2013, 02:29 PM
27. ### Reject test results?

Hi, For my master thesis I've done some compression tests on concrete samples. The results are graph in the graph below, where the stress is...

• Replies: 7
• Views: 1,640
04-11-2013, 03:57 AM
28. ### Bonferoni correction

I know what this is generally. What I am unclear on is exactly when you should use it. For instance I have seen this applied in some (rare) cases...

• Replies: 2
• Views: 1,789
04-09-2013, 04:39 PM
29. ### Percentage of delayed samples. Ways to calculate?

Hi I'm working on a thesis and I'm using a bit statistics to process the data. I have a population and in one sample (N=250) I measure the time it...

• Replies: 0
• Views: 1,455
04-05-2013, 05:13 AM
30. ### Comparing gender gap in elections with female candidates to elections with only male

Hi all, First I would like to apologize if my description of my problem seems incomprehensible. As my english isn't exactly top notch and I find...

• Replies: 1
• Views: 1,519
04-04-2013, 02:10 PM
31. ### Small sample and a discussion re: relevant analytical methods

I have a small sample that I have analyzed with various methods, however I want to have a discussion with smarter people than I if there are...

• Replies: 3
• Views: 1,818
04-01-2013, 05:13 PM
32. ### How to minimize variability in order to design a valid pricing experiment?

Good morning, I want to run a pricing experiment to see the change in the number of purchases (i.e.demand) in response to a 10% increase in price...

• Replies: 0
• Views: 1,775
03-28-2013, 10:04 AM
33. ### Inclusion of price index when regressing on real variables

I'm currently trying to estimate a demand function from a set of real variables. Would it still make sense to include a price index as a regressor...

• Replies: 0
• Views: 1,175
03-28-2013, 08:02 AM
34. ### Event Study

Hi, I'm new to the forum. I am trying to conduct an event study on the effect of a particular event on daily airline stock returns. I'm not sure...

• Replies: 1
• Views: 1,621
03-25-2013, 10:14 AM
35. ### Bivariate ranking versus marginal effects

This is related to an ongoing project I struggle through.... I have a list of satisfaction variables (42) that are suspected of influencing...

• Replies: 3
• Views: 1,911
03-19-2013, 04:02 PM
36. ### in economics; Market share change relative to market growth

Hi all I am not professional neither in economics nor in statistics, and I was wondering if you could help me: I am working on a project that...

• Replies: 1
• Views: 1,741
03-19-2013, 11:38 AM
37. ### Rates of implementation

Hello all, I've tried to find this elsewhere but can't seem to determine how to do it. I want to determine the implementing rate of GPS technology...

• Replies: 0
• Views: 1,171
03-19-2013, 05:52 AM
38. ### Job market for statisticans/quantitative data analyst

I am, I found out today, giving a presentation to my previous graduate program on real world use of data. Does any one know job sites that people can...

• Replies: 0
• Views: 1,748
03-18-2013, 07:04 PM
39. ### Increasing accuracy of measurements.

My lab has an Relative humidity analyser which states it is accurate to plus or minus 5%. If I use two similar analysers and take the average does...

• Replies: 0
• Views: 2,022
03-18-2013, 06:59 PM
40. ### Significance testing of proportions without knowing the sample size

I have a multivariate data set consisting of two groups with 5 specimens each. The data set describes types of bacteria in the gut of mice from two...

• Replies: 0
• Views: 3,529
03-18-2013, 10:54 AM
41. ### Unconditional statistical test

Hello, I am a student in translation and must translate a text about the economic impact of the Olympic Games in which there are quite a few terms...

• Replies: 8
• Views: 2,478
03-18-2013, 08:48 AM
42. ### Expert judgement and GARCH

According to the efficient market theory, we can't predict the world tomorrow (e.g. future stock prices or exchane rates). Although, I have read some...

• Replies: 3
• Views: 1,677
03-15-2013, 07:06 PM
43. ### NEED HELP with understanding when to use what method

I have been trying to familiarize myself with statistics but I'm getting confused on what methods to use when answering what questions. For...

• Replies: 3
• Views: 1,698
03-15-2013, 02:41 PM
44. ### Correlation based on binary events

I have a system with 5 components. Every 10 seconds the signal travels to all of them and I know how many of them responded. I need to know there...

• Replies: 2
• Views: 2,147
03-14-2013, 11:51 AM
45. ### GLM questions for landscape experiment

I am analyzing bird count data from surveys conducted each week (from Nov-April, when bird foraging most active near breeding cycle) for 6 years in 9...

• Replies: 1
• Views: 1,373
03-13-2013, 11:57 PM
46. ### Picking a subset of data points in multidimensional space

Hi I am looking for a way to reduce data points in a multidimensional matrix. Example: Variable 1: A1, A2, A3 Variable 2:

• Replies: 0
• Views: 1,824
03-11-2013, 09:33 AM
47. ### Whats the best way to analyse the correlation between these two variables?

Hello All, I have to admit my statistics skills are not amazing however, i'm very interested in improving my knowledge. I've been trying to work out...

• Replies: 8
• Views: 3,381
03-05-2013, 12:06 PM
48. ### Multivariate data set of two groups: finding which variables are statistically diff.

I have a data set consisting of two different groups (A and B) each with 5 specimens. We tested 73 different variables in each specimen and recorded...

• Replies: 7
• Views: 2,268
03-04-2013, 05:37 PM
49. ### cumulative distribution function

Hello to everyone and thanks for your time. I have a variable theta, distributed normally. I have a function V. I know how to calculate the...

• Replies: 2
• Views: 1,605
03-02-2013, 01:07 PM
50. ### Measuring the value of an app

Hello. So just finished running a fundraising event, and my team is trying to measure how much value having an app had and if it was worth it's...

• Replies: 4
• Views: 2,095
02-25-2013, 03:30 PM
51. ### Distorted risk measures

So I was reading about a couple of risk measures (Wang's transform risk measure and Proportional Hazard risk measure) in a pdf document that I found...

• Replies: 2
• Views: 1,212
02-22-2013, 05:54 PM
52. ### Multivariate Outliers Detection

Hello all, Can you please comment on the outlier detection of multivariate data. When I need to detect outliers for a data of say 118 variables...

• Replies: 11
• Views: 3,595
02-19-2013, 03:08 AM

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