The methodology tag has no wiki summary.
3
votes
1answer
51 views
Implementations of clustering with asymmetrical distance/similarity matrix
In my clustering problem I'm working with custom similarity measure and looking for any implementation of algorithms with asymmetrical distance or similarity matrix. I'm only interested in those that ...
0
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1answer
30 views
Estimating the number of birds in a specific area
I want to count the birds in an area. What's the proper statistical method for it? What are the good references for this topic?
4
votes
1answer
97 views
Confidence intervals based on the CLT: ever useful?
Suppose, for concreteness, that I am trying to estimate the mean of a population using a random sample of size $N$.
Many elementary books discuss forming a confidence interval for the population mean ...
0
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0answers
16 views
logdif modell different from log model
I'm not sure if a 1st difference transformation was a good idea. ADF of the dependent variable gave me 0.1177, so I couldn't reject unit root hypothesis, other unit root test though rejected the unit ...
3
votes
2answers
45 views
How to assess the improvement from a treatment?
When optimizing a computer program, I need to determine how much faster the program runs with the latest optimization. To do this, I run the program N times without the optimization and N times with ...
1
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0answers
47 views
Using ANOVA to analyse a distribution
I found a method in an paper, which I do not quite understand. In this experiment the influence of a within subject factor was analysed. In order to analyse the influence of the factor not only on ...
0
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0answers
24 views
Finding kind of dependency
I have an interesting (to me) real-life problem but only a very basic understanding of statistics.
I would appreciate a pointer to literature as I understand actually solving the problem is my ...
0
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0answers
33 views
Glasserian Grounded Theory Building Blocks
On reading the FAQ I was in hope this question pertaining a particular aspect of grounded theory would fall under data analysis. I appreciate if you would point me to which other community I should ...
1
vote
1answer
139 views
Achieving statistical significance in an A/B test
Out of one pool, I've randomly selected a small group (group A) and put everyone else in group B. Then, I'm observing whether or not they take a desired action.
If I'm looking to test at a 95% ...
4
votes
1answer
103 views
Research Methodology on Fareless Bus System
I am working on a project for a Masters Project. The town I am looking at Switched to a Fareless system in Feb 1, 2011. I want to look and see if this increased ridership by a substantial amount. I ...
1
vote
1answer
628 views
Which statistical method to use in survey-based quantitative research?
I hope you can help me because at the moment I am confused and helpless. I am final year PhD student, and my supervisors asked me to find out statistical methods other than exploratory (percentage of ...
3
votes
2answers
81 views
Measure to capture clustering in time based event
I am searching for a good measure to capture clustering in time based events. Say that for a given interval of 5 minutes, cars randomly pass in front of house ... say one car at every 10 seconds (for ...
3
votes
2answers
247 views
Effect of one independent variable of several dependent variables – best strategy?
I have a question regarding which analysis strategy is best suited for our objective. In an exploratory study based on data from a survey we conducted ourselves in India, we are analyzing the ...
9
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5answers
189 views
Is it ok to fit a Bayesian model first, then begin weakening priors?
When doing frequentist stats, there is a long list of big no-nos, like looking at the results of statistical tests before deciding to collect more data. I'm wondering generally if there are a similar ...
2
votes
1answer
111 views
The biggest difference between medical statistics and biological statistics
I am turning my work from medical statistics into biology statistics (fishery). I am wondering if there is a big differences in methodology or focus between these two fields? In medical field, we do a ...
1
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2answers
322 views
Statistical test to compare multiple treatments on the same 'individual' over time
I'm looking for a statistical test or tests to compare the effects of different 'treatments' on a single 'individual' over time. The single 'individual' could be one person or a group acting as a ...
3
votes
5answers
884 views
What is the simplest statistical analysis to compare 2 groups on a simple survey?
I designed a simple survey about cancer knowledge among adults. There will be two groups: Those that have first-hand experience with cancer (you or someone in your immediate family with cancer) and ...
5
votes
1answer
197 views
Is Ye Shiwen's 400m IM performance in Olympics “anomalous” statistically?
The 16-year-old Chinese swimmer Ye Shiwen swam more than 5 seconds faster than her personal best in women's 400m individual medley in London 2012 Olympics, winning her a gold. Her performance received ...
19
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2answers
480 views
Is Joel Spolsky's “Hunting of the Snark” post valid statistical content analysis?
If you've been reading the community bulletins lately, you've likely seen The Hunting of the Snark, a post on the official StackExchange blog by Joel Spolsky, the CEO of the StackExchange network. He ...
2
votes
1answer
1k views
Determining sample size necessary for bootstrap method / Proposed Method
I know this is a rather hot topic where no one really can give a simple answer for. Nevertheless I am wondering if the following approach couldn’t be useful.
The bootstrap method is only useful if ...
2
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0answers
55 views
How to analyze factors that have missing by design values for certain observations?
I am using an analysis for an experiment that I consider suboptimal. I am asking for any suggestions to improve this. I will briefly outline the experiment and what I’ve done, then ask your advice.
...
5
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3answers
181 views
Resources or methods for determining if a technique is in current use?
I know that this question is hard to answer, but I was wondering how you would determine if a statistical technique was in current use, or if it had a heyday a couple of decades ago but it's either ...
1
vote
2answers
168 views
How to model market share or a fraction of anything that sums to 100%?
Suppose we have sales of 3 products A, B and C which market share always sum up to 100%. How to model market share of product A using market shares of B and C? So that we will know that if share of A ...
2
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2answers
107 views
How to statistically test whether breastfeeding support influences breastfeeding initiation and duration?
I would like to know which technique is appropriate for analyzing data collected via self-administered survey. Some background information follows:
Topic: Breastfeeding support and the workplace
...
0
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3answers
113 views
What tool can we use to assess if there are enough data?
Imagine some paired data ${(x_i,y_i)}_{i=1}^n$ representing the results of two different measurement methods and the question is about the quantification of the bias between the two methods. Let us ...
3
votes
3answers
68 views
Participant identifier for a field study in a sensitive work environment
We are doing an evaluation in different organizations and need to get data from workers about their work behavior. As this information is something that could get workers in trouble, privacy is an ...
2
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0answers
47 views
Statistical faults of the article relating GDP growth with certain non-sensical variable
Colleague draw my attention to the following discussion paper. In my opinion this discussion paper is clearly intended as a critique of the routinely published articles in the field. The discussion ...
1
vote
1answer
153 views
How can I know a random small subsample has a good performance?
Sorry, if the title is confusing. not native speaker here.
I ran a survey study which had 15 7-point likert scale questions. Each question is ask people to judge how creativity an object in the ...
6
votes
3answers
838 views
When to use Fisher and Neyman-Pearson framework?
I've been reading a lot lately about the differences between Fisher's method of hypothesis testing and the Neyman-Pearson school of thought.
My question is, ignoring philosophical objections for a ...
0
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2answers
86 views
How to identify patterns/associations in network traffic?
The web-based company I work for has a system that receives packets of information from external sites. I would like to know what approaches can be used to identify patterns or associations between ...
12
votes
4answers
615 views
Examples of costly consequences from improper use of statistical tools
I suspect that most users of statistical tools are ancillary users (folks who have had little to no formal training in statistics). It’s very tempting for researchers and other professionals to apply ...
3
votes
1answer
290 views
How can I be confident about my forecasts and improve my methodologies?
Background
I usually do a fair amount of forecasting using ARIMA, linear or multivariate regressions, polynomial trends, etc. A lot of this forecasting is for simplistic use and not really basis for ...
2
votes
3answers
100 views
How to develop a forecast for counts where the counts per period is low?
I'm trying to analyze for any trends in what I consider to be low observations or counts.
Let's say you have a bus service with the following commuters:
...
1
vote
1answer
89 views
Sampler method to choose in Monte Carlo Markov chain estimation
When estimating the posterior via MCMC, are there guidelines on the best sampling method to use depending on the nature of the model?
There are a variety of forms of MCMC - the Gibbs sampler, the ...
3
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0answers
259 views
What is the best statistical method to compare case fatality rates of 17 years for 2 different states?
I have Case Fatality Rates (deaths per 100 cases) for 2 different states receiving different treatments for 17 years.
What is the best statistical method to compare Case Fatality Rates ?
The data ...
10
votes
1answer
220 views
Is it worthwhile to publish at the refereed wiki StatProb.com?
Background
I read about StatProb.com from a comment on Andrew Gelman's Blog.
According to the website, StatProb is:
StatProb: The Encyclopedia Sponsored
by Statistics and Probability
...
14
votes
2answers
664 views
Choosing seasonal decomposition method
Seasonal adjustment is a crucial step preprocessing the data for further research. Researcher however has a number of options for trend-cycle-seasonal decomposition. The most common (judging by the ...
1
vote
2answers
147 views
What's the difference between “measurement method” and “measurement procedure”?
The ISO VIM defines them as:
measurement method:
generic description of a logical organization of operations used in a
measurement.
measurement procedure: detailed description of a ...
12
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3answers
2k views
Top five classifiers to try first
Besides obvious classifier characteristics like
computational cost,
expected data types of features/labels and
suitability for certain sizes and dimensions of data sets,
what are the top five (or ...
3
votes
2answers
529 views
Multiple regression with binary predictors. Component value analysis
I have the data about process duration (in minutes) and components (procedures) done during it like this (CSV):
...
25
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31answers
3k views
Most famous statisticians
What are the most important statisticians and what is it that made them famous? (Reply just one scientist per answer please)
4
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4answers
1k views
Small sample linear regression: Where to start
FULL DISCLOSURE: This is homework.
I have been provided with a small data set (n=21) the data are messy, looking at it in a scatterplot matrix provides me with little to no insight. I've been ...
5
votes
2answers
491 views
Preferred method for identifying curvilinear effect in multi-variable regression framework
Say some previous findings identified a curvilinear effect of X on Y, (specifically that X had a positive effect on Y, and that X^2 had a negative effect). You want to see if the same holds for your ...
8
votes
1answer
397 views
What are some good frameworks for method selection?
I have been looking into theoretical frameworks for method selection (note: not model selection) and have found very little systematic, mathematically-motivated work. By 'method selection', I mean a ...
