Question

Consider the following data representing the price of plasma televisions (in dollars). 1289 1289 , 1148 1148 , 1140 1140 , 1183 1183 , 1244 1244 , 1183 1183 , 1069 1069 , 1382 1382 , 1137 1137 , 1202 1202 , 1291 1291 , 1412 1412 , 1208 1208 , 1316 1316 , 1130 1130 , 1073 1073 , 1178 1178 , 1399 1399 , 1351 1351 , 1245 1245 , 1129 1129 Copy Data Price of Plasma Televisions (in Dollars) Class Frequency Class Boundaries Midpoint Relative Frequency Cumulative Frequency 1067–1126 1067 – 1126 1127–1186 1127 – 1186 1187–1246 1187 – 1246 1247–1306 1247 – 1306 1307–1366 1307 – 1366 1367–1426 1367 – 1426 Step 1 of 7 : Determine the class width of the classes listed in the frequency table.

Answer 1

The frequency distribution table is as follows:

Classes	frequency	Class Boundaries	midpoint	Relative frequency	Cumulative frequency
1067-1126	2	1066.5-1126.5	1096.5	0.095238095	2
1127-1186	8	1126.5-1186.5	1156.5	0.380952381	10
1187-1246	4	1186.5-1246.5	1216.5	0.19047619	14
1247-1306	2	1246.5-1306.5	1276.5	0.095238095	16
1307-1366	2	1306.5-1366.5	1336.5	0.095238095	18
1367-1426	3	1367.5-1426.5	1396.5	0.142857143	21
total =	21			1

Class Width = Upper class limit of next class - Upper class limit of current class

Class width = 1186-1126

Class width = 60

Thus class width for classes in above table = 60