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73 views

Rates, underlying distributions, and measuring things

When comparing two metrics, say visitors and time spent on a website, by just taking the ratio (time on site)/(visitors) can this be misleading? And if so how can we describe this problem ...
40 views

How to track term prevalence on the web over time?

What is the correct way to track the prevalence of a specific term for each year over several years? The goal is a bachelor thesis in media sciences about the trend sport "Speedminton". In order to ...
122 views

Identifying a minimum time on web page as proxy for successful search outcome

Given a correlation between two sequences of numbers, I need to find to what point in one sequence the correlation is strongest. Here's why: I'm tracking large numbers of pages in a knowledge base, ...
20 views

I need a calculator that uses a contigency table of 11x6 [duplicate]

I need a calculator that uses a contigency table of 11x6. Anyone knows where I can find a calculator for my case? Thanks in advance.
207 views

How to Calculate a Z-Score from Power Log Distributions

Please forgive me if the question is non-sensical as I only have a elementary knowledge of statistics, and I have no idea where to start. I want to perform an analysis of some web analytics ...
76 views

Testing significance of a data point against an data set

Background I am currently testing conversions on a web page and would like to test if the changes I made yesterday produced a significant change in conversions. The Data Set For each day I test, I ...
85 views

Determine if a statistically significant preference exists

I'm trying to determine if there is any statistically significant preference for objects (other content, products, etc) rendered in a module in a web page. I'm trying to create a simple experiment to ...
315 views

Do unique visitors to a website follow a power law?

Suppose I have an ordered vector where the first element is the number of visits to a website in a given period of time by the unique IP with the highest number of visits, the second element is the ...
154 views

Simple extrapolation of web traffic

I have the following data for web traffic in Excel June 88,147 July 111,839 August 93,148 September 93,069 October 101,881 November 97,345 I can do a chart with a trend line and a linear ...
5k views

Model for predicting number of Youtube views of Gangnam Style

PSY's music video "Gangnam style" is popular, after a little more than 2 months it has about 540 million viewers. I learned this from my preteen children at dinner last week and soon the discussion ...
641 views

any alternative to kaggle for data mining & analysis competitions and training? [closed]

Are there any alternative to www.kaggle.com to test abilities for data mining? Or how can I find my own projects to test myself on data mining projects? Kaggle is a data mining community that ...
228 views

High-Frequency Time-Series Forecast With A Lower Bound

I am helping a friend with a data project. He's interested in building a canary-in-the-coal-mine alert system for his website which tells him when the number of users dips below some critical lower ...
179 views

What distribution is most commonly used to model server response time?

I have a servlet-based application wherein I measure the time taken to complete each request to that servlet. I already compute simple statistics like the mean and maximum; I'd like to produce some ...
398 views

Math behind multivariate testing for website optimization

I am looking for theoretical resources (books, tutorials, etc.) to learn about making sound statistical inferences given (plenty of) multivariate website conversion data. I'm after the math involved, ...
2k views

Is an online chi square calculator available for larger tables?

I am looking for an online Chi square calculator. I can see there are many for 2x2 tables. I am looking for an online calculator which can accommodate dimensions beyond 2x2.
326 views

Calculate peak concurrent users on a website

I am looking at setting up some website load testing scripts and need some help in finding a formula to estimate how many concurrent users are browsing a website at peak times, based on common metrics ...
125 views

Can you recommend an online survey platform for 5k+ participants?

I am planning to perform an online behavioral survey across a nationwide sample, and I expect several thousand responses. I expect to have not that many questions (perhaps 3 pages, 8 qs each), ...