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lidiya [134]
3 years ago
9

Choose the correct answer below.

Business
1 answer:
hjlf3 years ago
4 0

Answer:

D. SST is the total sum of squares. It represents the total variation among all the sample data.

Explanation:

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

If we assume that we have p groups and on each group from j=1,\dots,p we have n_j individuals on each group we can define the following formulas of variation:

SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2

SS_{between}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2

SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2

And we have this property

SST=SS_{between}+SS_{within}

If we analyze SST compares the individual values respect the grand mean \bar x in order to find the total variation. so the best option for this case is:

D. SST is the total sum of squares. It represents the total variation among all the sample data.

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