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

Find the highest and lowest values. $H=177,500$ $L=70,000$ Find the range. $R=H-L=177,500-70,000=107,500$ Find the class width by dividing the range my the number of classes. $W=\frac{R}{C}=\frac{107,500}{6}=17,916 \overline 6$ Round up. $W=17,917$ Add the width to the lowest value to get the lower limit of the next class. Find the upper limit of each class by subtracting 1 from the lower limit of the next class. $70,000+17,917=87,917$ $87,917+17,917=105,834$ $105,834+17,917=123,751$ $123,751+17,917=141,668$ $141,668+17,917=159,585$ $159,585+17,917=177,502$ Tally the frequency for each category and enter the results in the table.