Forum: Applied Statistics

Hi Everyone I want to compare thermal preference among lizard species. The species differ in sizes and i guess one will need to do ancova. The...

An insurance company offers me fire insurance, I calculate my risk/benefit equation and decide to accept or reject the offer. It's easy. A...

Hi everyone, A simple question: I have 1 set of 2D location points A that I use as reference. I have another set of location points B generated...

I'm using Gini coefficients as a measure of income inequality for self-selected groups of people. There are 30 groups, each of which as between 6-8...

I have a problem with the analysis of my dissertation. The topic is constructed wetlands and I have measured a set of variables to categorise these,...

i have been reading Mackinsey valuation textbook and they mentionned 2 points that puzzled me: 1- arithmetic average (they were talking about the...

wanna know something about the the Medicare and Medicaid data. if you have some experiences of this data, please contact me through...

I am currently constructing a thesis to comply with my requirements in my BSA program. My thesis is about comparing two groups of similar...

Hey there, I've been working on the following problem for a while now and I have done as much as I could, but I need your help to go any further. ...

I need help with the preprocessing a dataset. The problem is that I do not have any prior knowledge on how to approach these kinds of situations,...

Hey guys, just came across this forum and hope that I can find someone, who can help me out here. I'm currently analyzing my data obtained from...

Is the question, I'm not sure how to do it. I understand the concept of what its trying to have me prove that u doesn't depend on x, but I don't...

Hi All, I am new to time series analyst community. Basically I am an IT capacity planner and need to understand the concepts of Time series...

I am looking at some lab numbers and trying to determine if it is possible to correlate two different sets of data in some manner. I realize this is...

Hi everyone, I have been trying to develop a model that will allow me to estimate the number of beneficiaries of the different benefits of social...

Hi There, I have a problem which looks a bit like the "Assignment Problem", but I can't find an algorithm that will do what I need. Specifically:-...

Hi Everyone, I'm new to the forum so please forgive me if I've posted in the wrong area or asked a somewhat simple question - or both! I have a...

I ran some materials tests earlier today, and this is the most basic way to describe my problem: I have n chains, each with x links on them. If I...

Hello I would like to forecast the sales in units for a maximum of 7 days ahead (sometime less than that). For that particular scenario, which is...

Hi All :wave: I would appreciate feedbacks on the following issue. First, I will describe the background data, and then I will go straight to the...

Hello, I have a vector of observations. I would like to create a density plot from these. So I have for each value (vi) - the number of times it...

Hi, I did stats years ago and am now quite rusty. At work we're looking at a straight forward problem: how to demonstrate we have no...

Let X be exponential(lambda), and let Y=max(1,X). Find the cdf of Y. Also sketch the cdf. Suppose that X is discrete with pmf p(0)=p(1)=2p(2) (and...

Hye guys...I'm from Malaysia..Currently doing my assignment on research subject.. Can anyone help me by checking my grammar and perhaps to correct...

Hello, I am fitting the solutions of a 2D differential equation to some experimental data. The solution does not have an analytic form so...

A well-known set of financial studies seems to show that a retiree can withdraw a fixed dollar amount from his investment portfolio that is about 4%...

Dear Talk Stats-people, I am currently writing a thesis about countries' level of democracy and their economic growth, where democracy is...

Hello all: I just received a reference text in quality control – Statistical Quality Control by Montgomery 6ed. In describing the (2 sample unequal...

hello all, here's the problem: I'm given a set of measurements and a statistical model. the measurements: {y(n)}, n=1,...,N.

Hi All, This is my first post, I know it's a fairly simple question but I'm not sure what to do: * I know that x number of users completed...

Hi all! I am running over the same data a time-series regression and a cross section analysis. The time-series regression determines the bond...

I am trying to set up a formula for risk assesment for data cleansing in our organization. What we do is cleanse data and mail out pieces based on...

Are there equations that can be used to do f, t and z tests without the raw data? In other words, I have the statistics; e.g. Mean, variance etc.,...

Im currently doing a project and part two says "Calculate the pairwise correlation coefficients between ER and the 3 other variables. Test the...

Hello all! I have been asked to build a 'performance/economic' model for some schools in my state. this is slightly above my pay grade, so i could...

Dear all, I am a beginner regarding statistics and I would like to ask you the following question (after looking everywere on the internet but not...

Hi everyone! I am testing a theoretical model which determines a Bond Spread. My aim is to assess the predictive power of the model. I have...

I've searched for this book in all local bookshop here but could not lay my hands on any. pls can anyone give me a link to a quick download of " J....

Hello All, I am new to this forum and actually new to statistics. I am comparing the results of measurements made using 20 different viscosity...

Hi guys, I am working on a piece of revision, we've been given a set of data and 4 other variables which we must statistically check whether they...

Hello all, I have one group of patients (N=100) whose balance is measured before and after an operation. I calculate 5 different sway measures out...

Hi there, I need to do some forecasing for real estate. Basically I have time series, price, demand trends for the last 3 decades and I would like to...

Hello, I have a table with 3 categories in it: group A, group B, group C. Each group has a Mean. I want to test if there is any statistically...

Hi All, I have a time series and several candidates for possible future paths. How can I estimate how likely each of the paths are based on the...

I am trying to compare our historical labor times. The time it currently takes to perform a task vs. the established time standard in place. I would...

Hi I have question. We are trying to see how temperature changes over the time in a bioreactor. Since the bioreactor is large and open system the...

I am working in the nuclear waste analysis. I would really appreciate your input. We measure a content of Pu-239 in grams (radioactive element) in a...

Hi there, I am going to predict product sales and plot trends, with sales records of different products from wk1 to wk13, and time is the only...

I am in serious need of help when it comes to statistics. I am currently in a statistics course that is a prerequisite, and I have no desire to...

On another forum someone commented on how many people had looked into my profile. The number seemed high so I said I was flattered but I wonder now...

Hi, I am working on a problem in which I am asked to estimate the supply and demand functions for coffee at a coffee shop as a function of price...

I'm using the following Risk of Ruin formula: e ^ (-2 * WR * BR ÷ VAR) WR = win rate or expectation BR = bankroll or portfolio size ...

I have before and after data from 4 stations (a,b,c,d). The data were collected monthly for 30 months before and for only 14 months after the...

Hi Everybody, Am working on the rubostness of estimator, and needs to introduce outliers into a normally distributed simulated data.Please how do I...

Hi, I'm doing a degree project on a comparison of Cancer Survival Rates for two ten year periods for different cancer types and am having great...

Hi, I could use some confirmation. I have a MANOVA situation with 4 different DVs measured on all subjects. As well, each DV was measured at 3...

Greetings, A question in my book ask me to estimate the PAM model but it doesn't explain what to do or how to do it. ...

Hi Have a data analysis assignment and need help in how to go about solving it. Just point me to a section in a book that deal with how to solve...