Anderson-Darling Goodness of Fit test
Hi there I would like to know if anyone has a PDF copy of the Table of Anderson-Darling critical values at the 5% significance level for a Weibull Distribution Goodness of Fit Test? Here is my email...
View ArticleFantasy Football: determining scarcity
I know that there are other fantasy football questions on the forum, and I have read them. Mine is a little bit different. I am looking for an equation to determine supply of a position to create a...
View ArticleAnalyzing multiyear data
Hi all, I have a question regarding the use of correct outcome measure when we utilize multiyear data. Suppose I am assessing 'hospital use by uninsured in a state over 10 years'. I am not sure whether...
View Articlecomposite index with PCA derived weights
composite index with PCA derived weights Seasons greetings ! I was trying to develop a composite index of vulnerability including 38 indicators. I am using weights obtained from Principal component...
View ArticleCovariance matrix singularity
Hello, Could anyone explain, why the matrix of covariance becomes singular when the the number of parameters P is less then the number of samples N? Thank you in advance, Elena
View ArticleStatistical Protection from a Hacker
Hi everybody! Suppose that a poker player is banned from a poker website due to his/her misbehaviour. This player creates a new account from a new computer in order to play again. Is there any possible...
View Article[GARCH model] Why do we need a "mean equation" ?
Hi, :) As i said in my first topic, I'm a beginner in financial statistics. I read a lot of things about GARCH, but I didn't find a precise response. :confused: According to this document (pages 4,...
View ArticlePointers - Creating a model for predictions
I'm a student doing a project for a retail company that is trying to calculate their lost sales due to malfunctioning products. To do this we've done a survey among customers who had such products. The...
View Articleactual prices and two predictions -> ANOVA or MANOVA?
Hello everybody, I'm unsure which stats to use for the following problem: I've got a list of prices for stocks of a certain date. In that list I also have two predictions for prices for the same date....
View ArticleGrouping similar competitors
Suppose we want to look at which airlines have similar pricing strategies. The data set looks like this: Variables: Flight Origination, Flight Destination, Airline1 Price, Airline2 Price, ....Airline10...
View ArticlePearon's chi square // xtpoisson
Hi, I am using Poisson, fixed effects on stata and intend to adjust the standard errors because overdispersion using Pearson chi-square. In stata there is a command (estat gof) which provide this...
View ArticleCombined ANOVA
Hi everybody, My problem is as follows: I designed three plots of 250 m2 On each plots there is three plant species with 3 replicates by species (3*3= 9 plants). The species are not randomized trough...
View ArticleTesting Difference of Values from Lognormal Distribution?
I have data that fits a lognormal distribution really well. My primary goal is to create a statistical classifier using this distribution to apply to new data from the same source. Essentially, I have...
View ArticleMissing values problem
I trying to set up a count model Poisson for number of births of women. I have a datavariable giving age_of_respondent_at_first_birth. Some women havn't given birth and appear as missing on...
View ArticleDeriving at Normality Assumption
I have taken from this forum that a way to determine normality for a TTest, is that you can take the mean of one group in the strata and subtract it from the observations in the other group. Next test...
View ArticleCombining several estimates to obtain "best guess" with confidence limits
I have a number of estimates for mean wind speed which have been derived from a number of difference sources, each using a different methodology and data sets. Each estimate has a known standard error,...
View ArticleFailure Prediction Model - Intersecting Distributions?
Hi all, I'm not a statistician and worried that my question is to sophmoric, so I'm hoping for your patience. I have a use profile for a product measured in days. It turns out that most customers use...
View Articletest a marketing effect
Suppose a company has retail stores in two regions, A & B and ran a marketing campaign in region B for 3 months. The average monthly store sales of last three months BEFORE the campaign of A is 5%...
View ArticleRoot Mean Squared Error/Deviation in Simulation Studies....
hello members! :wave: i am having a little bit of trouble understanind what the Root Mean Squared Error (RMSE) or Root Mean Squared Error Deviation (RMSD), which i know are two names for the same...
View Articledifferent fiscal year end and fama macbeth regress
dear all, can i apply fama macbeth regression for a short time period 3-4 years? plus if the sample firms consist of firms with fiscal year end at december and firms with fiscal year end at june, can i...
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