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12 April, 21:24

The quantity is called the pooled variance estimate of the common variance of two unknown but equal population variances. It is the weighted average of the two sample variances, where the weights represent the: sample variances. sample standard deviations. degrees of freedom for each sample. None of these choices.

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  1. 12 April, 21:52
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    sample variances

    Step-by-step explanation:

    The pooled variance method is used to estimate the variance of several different population with different means, but are assume to have the same variance.

    The weights represent the sample variances.

    So the correct answer is

    sample variances
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