Better to Wear a Hat for Davening at Home than to Daven with a Minyan

So, if you say that one should rather not be in shul w/o a hat and jacket, could one derive that the not-properly-dressed man should not count for minyan? After all, he really should not be there.

The real question is thus:

Considering he should better daven at home with a hat rather than at a minyan without a hat, does that mean if he won’t have a hat either way (he’s away from home and forgot his hat) he should daven at home (without a hat/jacket) or should he daven with a minyan (without a hat/jacket)?

Essentially, the question is whether the problem is davening without a hat/jacket (bchlal) or the problem is davening in a shul (with a tzibur) without a hat/jacket.

MDG,

If there were only nine others, he probably should remain to be the tenth (according to some shittos, it’s not considered tefillah b’tzibbur unless all ten daven, so he probably should daven with them).

Englishman,

The problem is davening inappropriately clad bichlal. Since he will do that any way, he should daven with a minyan.

since obviously an Eved would not have been wearing the Levush Yehudi of a Fedora and Sportscoat

I’ve seen many Canaanim dressed that way.

Oomis: R’ Ovadia actually has a T’shuvah where he says that single girls should have to cover their heads while they Daven. Not their hair, but their heads, just like a guy can’t Daven without a Kippah on. In the end he says they don’t have to, but it sounds like he thinks they really should. (The Tzitz Eliezer deals with the same issue and says they shouldn’t, but he needs a fairly Dachuk Chiddush to say that).