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Variance overlapping isn't a reason to discount this analysis. Also note that the variance narrows substantially for older age groups. So effectively what the
by iaw 5y ago
Variance overlapping isn't a reason to discount this analysis. Also note that the variance narrows substantially for older age groups. So effectively what the variance says is that some younger people are vastly more responsible drivers than other young people but older people tend to be more responsible in general.
- thatcat 5y agoThere could be a number of factors that have nothing to do with responsibility, that's a narrative that gets added to explain the data. You need to do ANOVA test to verify any significant difference in data sets, not look at avg - esp when its not a controlled experiment.