Per [0] (2001; in Czech), average distance between subway stations is 1038m, tram stops 500m and bus stops 698m.
A related metric is walking distance from home to public transportation stop. Per [1] (2011; in Czech), most of people in the city need to walk less than 5 minutes to reach a stop. (There's a table with a breakdown by walking time and city part in chapter 7.) The same work cites average walking speed as 88.69 m/min, which gives you, for most inhabitants, <450m to reach a public transportation stop.
Per [0] (2001; in Czech), average distance between subway stations is 1038m, tram stops 500m and bus stops 698m.
A related metric is walking distance from home to public transportation stop. Per [1] (2011; in Czech), most of people in the city need to walk less than 5 minutes to reach a stop. (There's a table with a breakdown by walking time and city part in chapter 7.) The same work cites average walking speed as 88.69 m/min, which gives you, for most inhabitants, <450m to reach a public transportation stop.
[0] http://envis.praha-mesto.cz/rocenky/DZ_OO/pril_practexty/BK0... [1] https://dspace.cuni.cz/bitstream/handle/20.500.11956/51223/B...
(EDIT: Updated units.)