Questions
stat_400_120258_253926 PA13-1
Single choice
When should we use a matched pairs method for testing two population means?
Options
A.Only when the sample standard deviations from the two groups are approximately equal.
B.Only when the population variances are known
C.Only when the population variances are unknown
D.Only when the sample sizes from the two groups are equal.
E.Only when there is a link between observations in each of the two samples defined in the experimental design.
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Step-by-Step Analysis
In comparing two population means, the matched pairs (paired or dependent samples) approach is specifically designed for data where each observation in one sample has a natural, meaningful link to an observation in the other sample. This pairing creates dependence within pairs and allows us to analyze the difference within each pair, which reduces within-pair variability and improves the precision of the......Login to view full explanationLog in for full answers
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