The first table in combination with the second table offer a good start for selecting a wire gauge for data exchange.
As indicated 24 AWG is one of the standard wire sizes used to transfer data. This link provides a graph of 24 gauge twisted pair wire;
24AWG Frequency vs Attenuation in dB/meters.
So the table provide DC resistance and the link provides AC resistance [for 24 gauge wire].
Which leads to the two reasons to select the correct gauge wire; resistance or Wire Current carrying capacities .
Data or signaling use resistance per gauge, while power lines use Current carrying ability.
Speaker wire is normally around 16AWG [16-Gauge], also 18-gauge and 14-gauge are common.