And if you want to go even more FP... 
sub Gen_Stats {
    my $stat = {};
    my ($cnt, $max, $min, $tot);
    $stat->{ADD} = sub {
        $cnt += @_;
        for ( @_ ) {
            $tot += $_;
            $max = $_ if ! defined $max || $_ > $max;
            $min = $_ if ! defined $min || $_ < $min;
        }
    };
    $stat->{MAX} = sub { $max };
    $stat->{MIN} = sub { $min };
    $stat->{AVE} = sub { $cnt ? $tot / $cnt : undef };
    $stat->{TOT} = sub { $tot };
    $stat->{ADD}->( @_ );
    return $stat;
}
my $stat_info = Gen_Stats();
while ( <DATA> ) {
    chomp;
    $stat_info->{ADD}($_);
}
print join "\t", map { $_->() } @{$stat_info}{qw/MAX MIN AVE TOT/};

[download]
This code was borrowed from RFC: Tool::Box. I recommend using List::Util when and wherever possible. It has been part of the core since 5.007003 and uses XS when possible. The only real limitation I see with it is that all the items in the list must be known at once as I pointed out in How A Function Becomes Higher Order.

Cheers - L~R

In reply to Re^3: minimum, maximum and average of a list of numbers at the same time by Limbic~Region
in thread minimum, maximum and average of a list of numbers at the same time by LucaPette

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