On average does research showfemales or males use more words per day
and what is the difference?

By "more words" do you mean larger total volume of utterances (more
talking) or greater number of different words (wider vocabulary used)?

Yes, I mean "more talking"! Who does the most talking/utters the most
words during a given period of time. e.g.one day. I had read somewhere
it was females but a student in one on my psychology classes says it's
males. We need proof. Thanks

This might interest you:

"Silence and talkativeness is another interesting aspect of
gender-specificity in conversational strategies due to the fact that women
are often believed to talk more than men.  This widespread belief, however,
has been unanimously disconfirmed by anthropologists.  In an experiment
where males and females were asked to describe three pictures, males were
found to speak an average of 13 minutes per picture as opposed to females
who only spoke an average of 3.17 minutes (Swacker, 1975). Further research
shows that men talk more than women in public settings while being less
involved in private talks (Coates, 1993; Eakins and Eakins, 1978; Spender,
1980; Steinem, 1991).  Researchers who have investigated the issue have
indicated that public settings were considered as a ground for
competitiveness, hence the greater amount of talk by men in public.  Women
have been shown to talk more in private with female friends about topics
often considered trivial and unimportant by men..."

http://hhobel.phl.univie.ac.at/mii/gpmc.dir9606/msg00013.html

I can garentee that females definatly talk more, (by choice) some jobs
require males to talk more but im talking about talking for pleasure