There could be a whitespace or invisible character that is causing this problem with strcmp(). You can use trim() to help clean up strings and then use a literal equation operator, === to test for true equality. See below
$condition = trim($_SESSION['condition']);
if ($condition === 'Below Average') {
echo 'True';
} else {
echo 'Nope!';
}
See if that helps at all.
Also, you can use var_dump($_SESSION['condition']); to inspect the value.