Question: I'm constructing an 80% confidence interval for a population mean. how do I know if I'm picking the right column in the t table distribution

I'm constructing an 80% confidence interval for a population mean. how do I know if I'm picking the right column in the t table distribution with my degrees of freedom 14 and I'm constructing an 80% confident interval. now I'm on the calling part of the t distribution table, which I did 1 - the level divided by 2 so 1 - 0.80 / 2 = 0.6 so what column on the t distribution table do I use

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