Here is the code that can work on any post/page
global $wpdb;
$pId = $post->ID; //if using in another page, use the ID of the post/page you want to show ratings for.
$row = $wpdb->get_results("SELECT COUNT(*) AS `total`,AVG(review_rating) AS `aggregate_rating`,MAX(review_rating) AS `max_rating` FROM wp_wpcreviews WHERE `page_id`= $pId AND `status`=1");
$max_rating = $row[0]->max_rating;
$aggregate_rating = $row[0]->aggregate_rating;
$total_reviews = $row[0]->total;
$totl = $aggregate_rating * 20;
$wpdb->flush();
And to show aggregate ratings in star form, simply add this:
<div class="sp_rating" id="wpcr_respond_1"><div class="base"><div style="width: <?php echo $totl;?>%" class="average"></div></div><?php echo ' ' . $total_reviews;?> Reviews</div>
For displaying it as,
Overall: 4.67 stars for 60 reviews.
echo "Overall: " . $aggregate_rating . " stars for " . $total_reviews . " reviews.";