"Long-term median within 20% of background median and the 30-day median for both DOC and TOC is within 20% of seasonally-adjusted median background levels as measured histroically or at appropriate reference sites. The 30-day median calculation should be based on a minimum of 5 weekly samples taken over a period of 30 days."
Notes say
"Long-term median within 20% of background median and the 30-day median for both DOC and TOC is within 20% of seasonally-adjusted median background levels as measured histroically or at appropriate reference sites. The 30-day median calculation should be based on a minimum of 5 weekly samples taken over a period of 30 days."
but statistic is mean.
Which is correct?