Please check out the lines:
<?php
<$conn=mysql_connect("localhost","root","root");
echo("connected"); ......

Please remove the "<" before $conn

Regards

Consider the following:

<?php
if(isset($_POST['btnDelete'])){
for($i=1;$i<=4;$i++){
if(isset($_POST['checkbox'.$i])){
echo "<br>".$_POST['checkbox'.$i];
}
}
}

Sorry .... onChange="this.submit();" goes in the SELECT tag

This should be the correct statement I suppose:
$query="SELECT count(*) FROM stats WHERE BirthCountry = ".$country." ;";

Regards.

Replace your Double Quotes by Single Quotes, and vice versa.

echo "<form action='show.php' method='post' onChange='this.submit()'><select><option value selected>select</option><option...

try this : http://in2.php.net/download-docs.php

You can search for PHP Manuals in CHM format. CHMs are easier to deal with.