Answer:
0.82
Step-by-step explanation:
Step 1: (Calculating mean)
=> [tex]\frac{5+6+7}{3}[/tex]
=> [tex]\frac{18}{3}[/tex]
=> Mean = 6
Step 2:
=> (5-6)² = (-1)² = 1
=> (6-6)² = (0)² = 0
=> (7-6)² = (1)² = 1
Step 3: (Adding all values calculated in step 2)
=> 1+ 0 + 1 = 2
Step 4: (Dividing the result in step 3 by no. of observations)
=> 2/3 = 0.67
Step 5: (Get square root to calculate the deviation.)
=> [tex]\sqrt{0.67}[/tex] = 0.82
