equal variances
1- Assuming this represents a random sample from the population, the sample mean is an unbiased estimator of the population mean. 2-Because they are robust, t procedures are justified in this case. 3- We would use z procedures here, since we are interested in the population mean.
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is a data set with same variables but observed from different group of respondents
Pooled variance is a method for estimating variance given several different samples taken in different circumstances where the mean may vary between samples but the true variance (equivalently, precision) is assumed to remain the same. A combined variance is a method for estimating variance from several samples, given the size, mean and standard deviation of each. Mathematically, a combined variance is equal to the calculated variance of the set of the data from all samples. See links.
When data is homogeneous over k independent samples of size n_i for i=1,2,...,k, the pooled variance is given by s_p^2=((n_1-1) s_1^2+(n_2-1) s_2^2+⋯(n_k-1) s_k^2)/(n_1+n_2+⋯+n_k-k)
1- Assuming this represents a random sample from the population, the sample mean is an unbiased estimator of the population mean. 2-Because they are robust, t procedures are justified in this case. 3- We would use z procedures here, since we are interested in the population mean.
Pooled resources and skills are
Kingdoms of vegetals and animals are dominated by the carbon chemistry.
The pooled quota means a waiting list for a train ticket. These are usually seen in a small group of cities in smaller countries.
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Benevolent associations pooled money together to provide help to new immigrants.
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Pooled Human Plasma
Cost Centre: It is that department in factory where all costs are pooled or costs are allocated. Profit Centre: Is is that department where only profit is pooled like sales department.
Joint stock company
"Pooled" or "fooled" would rhyme with "cruel."
The homophones for "pulled" and "dragged" are "pooled" and "dragg'd."