Question: The data displayed below represents the electricity cost during a recent month for a random sample of 50 one-bedroom apartments in a large city.
|
96
|
171
|
202
|
178
|
147
|
102
|
153
|
197
|
127
|
82
|
|
157
|
185
|
90
|
116
|
172
|
111
|
148
|
213
|
130
|
165
|
|
141
|
149
|
206
|
175
|
123
|
128
|
144
|
168
|
109
|
167
|
|
95
|
163
|
150
|
154
|
130
|
143
|
187
|
166
|
139
|
149
|
|
108
|
119
|
183
|
151
|
114
|
135
|
191
|
137
|
129
|
158
|
a) Using seven classes of equal width organize the above data as a less-than cumulative frequency distribution.
b) Draw to scale the less-than ogive for the above data.
c) Use the ogive to determine:
d) The percentage of apartments for which the electricity cost is in the range $115 - $135.
e) The mid- 75 percentage range.