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Question

7:29 PM in x' g https://perce.ecampus.com x" D Bookshelf Online: Basic Bus ×.' D Bookshelf On ttps://online.vitalsource.com/#/books/9780321 947246/cfi/781/4/2@1 00:0.00 50 CHAPTER 2 Organizing and Visualizing Variables SELF 2.16 The file Utility est the cost of electricity (in S) during July 2013 for a random contains the following data abour 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 1 148 213 130 165 141 149 206 175 123 128 144 168 109 167 95 163 150 154 130 143 187 166 139 149 108 119 183 151 114 135 191 137 129 158 a. Construct a frequency distribution and a percentage distribu- tion that have class intervals with the upper class boundaries $99, $119, and so on. b. Construct a cumulative percentage distribution. Around what amount does the monthly electricity cost seem to be concentrated? near cities spend

Explanation / Answer

Solution :
We are given that : The data of the cost of electricity ( in $) during July 2014 for random sample of 50 one bedroom apartments in a large city.

Part a) Construct frequency distribution and percentage distribution that have class intervals with upper class boundaries $99 , $119 and so on.

Minimum = 82 and Maximum = 213

Thus we start classes from 80.

Part b) Construct cumulative percentage distribution.

Part c) Around what amount does the monthly electricity cost seem to be concentrated ?

From the above table of cumulative percentage distribution., we can see Maximum percentage 26% is around 140-159 , hence the monthly electricity cost seem to be concentrated around $140-$159.

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

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