Consider a panel with frequency weight 4. What does that mean? Does it mean that there are four independent panels, each alike? Or does it mean there is one panel and that each observation is observed four times? If there are 2 observations in a panel, each with a different frequency we...
Dear Statalisters, I have a panel dataset consisting of 25 years and 150 countries. I have a variable (var1) whose geometric mean I estimate for every country separately. That is, I use "bysort country: gmeans var1". This gives me 150 different geometric means; one for each country. ...
An adaptive exponentially weighted moving average-type control chart to monitor the process mean Exponentially weighted moving average (EWMA) control charts are typically used for faster detection of shifts in the process mean, relative to a Shewhart c... A Mitra,KB Lee,S Chakraborti - 《Europea...
30 In other words, GWR is used to identify local nonstationarity in values of variables; stationarity refers to the situation where mean, variance, and dependency of location do not change through space.31 In effect, GWR moves a weighted window over the spatial data and estimates unbiased slope...
wtd_mean() is a tidy-compliant wrapper around stats::weighted.mean() summary_table() returns a tible with summary statistics similar to the Stata command sumInstallationInstall it this way.install.packages("pollster") Or get the development version....
Applying the isotonic regression by Ayer et al (1955), the method minimizes the mean squared errors with respect to both finite and infinite dimensiona... H Tanaka 被引量: 9发表: 2008年 Efficient kernel-based semiparametric IV estimation with an application to resolving a puzzle on the ...
We assume that the mean and variance of X1, condit... EM Bolger,WL Harkness - 《Annals of Mathematical Statistics》 被引量: 92发表: 1965年 Exponential characterizations motivated by the structure of order statistics in samples of size two Motivated by the observation that for a sample of ...
Review Manager 5.3 was used to calculate the standardized mean difference (SMD) and 95% confidence intervals of apparent diffusion coefficient (ADC), tissue diffusivity (D), pseudo-diffusivity (D*), and perfusion fraction (f). Stata 12.0 was used to pool the sensitivity, specificity, and area...
I need to compare the mean response on Q19 for the two brands. With unweighted data, I would simply use a t test - no problem. But with the weights I have an issue. The t test does not accept weights. If I do the test by constructing my own t-stat, the numerator would be just...
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