Step 1 :Step 1: Multiply each score by its frequency to get the 'fx' column. The result is: \(1*5 = 5\), \(2*10 = 20\), \(3*15 = 45\), \(4*20 = 80\), \(5*25 = 125\)
Step 2 :Step 2: Sum up all the values in the 'fx' column to get \(\Sigma fx\). The result is: \(5+20+45+80+125 = 275\)
Step 3 :Step 3: Sum up all the frequencies to get \(\Sigma f\). The result is: \(5+10+15+20+25 = 75\)
Step 4 :Step 4: Divide \(\Sigma fx\) by \(\Sigma f\). The result is: \(\frac{275}{75} = 3.67\)