Step 1 :Step 1: Calculate the total number of ratings. The total number of ratings is the sum of all the frequencies. In this case, there are 6 ratings, so the total is 6.
Step 2 :Step 2: Calculate the sum of the product of each rating and its frequency. In this case, the products are: \(4*1 = 4\), \(6*2 = 12\), \(5*1 = 5\), \(7*1 = 7\), and \(8*1 = 8\). So the sum of the products is \(4 + 12 + 5 + 7 + 8 = 36\).
Step 3 :Step 3: Divide the sum of the products by the total number of ratings to find the mean. In this case, the mean is \(\frac{36}{6} = 6\).