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

Find the width of each class by subtracting the lowest value from the highest. Divide the difference by 7, as 7 classes were specified in the instructions. Round up to determine the width. $\frac{110-54}{7}=\frac{56}{7}=8$ Round up to 9. Note that rounding up is required even when the quotient is a whole number. The lowest value is 54. Add 9 to each lower limit to find the next lower limit in the table. The upper limit will be one less than the lower limit that follows. $54+9=63$ $63+9=72$ $72+9=81$ $81+9=90$ $90+9=99$ $99+9=108$ $108+9=117$ (Computed only to find the final upper limit)