use strict;
use warnings;
my @Dset1 = (5, 6, 7 , 8, 10);
my @Dset2= (10,11,12);
my @Dset3 = (16,48,49);

Data('Info',@Dset1);
Data('Info',@Dset2);
Data('Info',@Dset3);

my $avg = average(\@data);
print "The average is $avg \n";
sub average {
@_ == 1 or die ('Sub usage: $average = average(\@array);');
my ($array_ref) = @_;
my $sum;
my $count = scalar @$array_ref;
foreach (@$array_ref) { $sum += $_; }
return $sum / $count;
}