I am trying to analyse some data using the coefficient of variation (stdev/mean), but I have two problems:
- the data is not 100% positive and:
- the mean is very close to zero (and as Wikip...
I am trying to figure out a regular expression to match some URL's for a website. The expression needs to match the main URL and any random URL's.
The main URL would be: http://www.website...
Can experts solve this problem:
The Premise : Automated Box Storage & Retrieval
The Problem: Given the length of a storage lane, width of each stop with the lane, and speed of the vehicle...
Hi,
I have an Excel spreadsheet that I'd like to use the IF statement for. However, if there is another way to get the following to work, please advise. I have a spreadsheet that has val...
I would like to accomplish in PHP something that easily done in Excel.
I have an array of data, I would like to calculate the Logarithmic trenline in order to graph it late ron.
I have f...
Hello,
I have a formula for intra-portfolio correlation but I think that it would be much easier to compute using matrices. Can someone show me please, how can I compute Q using the intrapo...
Hello,
I think that either I am doing somehing wrong or there is something wrong with the var and covar functions in MS Excel. As far as I know, covar(X,X)=var(X). But if I try this in Exce...
How do I find the confidence interval estimate given the following information:
A simple random sample of thirty-six students has a mean age equal to 25 years. Given standard deviation = 4....
Can someone please tell me how I can possibly implement probability distributions such as Normal, Exponential, Weibull, Gamma, LogNormal, Beta, Pearson6, etc using C++ libraries. I'm trying to...
I have the following sheet that has pivot tables. I would like to have the run a t-test on each cell in the first pivot table of this sheet (the count pivot table). In essence I am trying to...
Hi all,
I was wondering if someone could explain to me how to calculate some probabilites please:
There is a draw with 300,000 tickets being sold.
The top prize is one million, and th...
Hi,
Is the colt package statistically accurate with large matrix calculations like: QRDecomposition for a 400X400 matrix? Does the precision fall off at any point? Does it compare to the...
I am a question about actuarial science. In particular, about mortality tables and the VBT (Valuation Basic Table).
I am trying to understand the structure of the table. I am looking for so...
What is the probability of throwing 20 dice and getting all of them show 1? How can I calculate this?
