Example on cumulative frequency distribution

Reference no: EM13241447

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

1 Using seven classes of equal width organize the above data as a less-than cumulative frequency distribution.

2 Draw to scale the less-than ogive for the above data.

3 Use the ogive to determine:

4. The percentage of apartments for which the electricity cost is in the range $115 - $135.

5. The mid- 75 percentage range.

Reference no: EM13241447

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