## Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Since the class has 1 decimal place, the boundary will have 2 decimal places. Subtract 0.05 from smallest value and add 0.05 to the largest value to find the boundary. $16.3-0.05=16.25$ $18.5+0.05=18.55$ To find the midpoint, add the upper and lower values and divide by 2. $\frac{16.3+18.5}{2}=\frac{34.8}{2}=17.4$ To find the width, subtract the lower value from the upper value. $18.5-16.3=2.2$