Norway is an EEA/EFTA member and is not in the EU.
The first Google hit for "is Norway in the Single Market?" indicates it is in the Single Market.
But I thought Norway was not in the Single Market, but in EEA/EFTA, which has its own treaty that replicates much of the Single Market legislation, delivering an effect that is much like being inside the SM, but technically is not.
Is Norway in the Single Market?