What is the average frequency in MHz for stations with an ERP W of 170?
CREATE TABLE table_name_54 (frequency_mhz INTEGER, erp_w VARCHAR)
SELECT AVG(frequency_mhz) FROM table_name_54 WHERE erp_w = 170
### Context: CREATE TABLE table_name_54 (frequency_mhz INTEGER, erp_w VARCHAR) ### Question: What is the average frequency in MHz for stations with an ERP W of 170? ### Answer: SELECT AVG(frequency_mhz) FROM table_name_54 WHERE erp_w = 170