randomly selected 120 customers who use this service. In the last month, the value of these invoices, in thousands of $, is reported in the following frequency distribution. The calculated average value of customer invoices is: Note: Answer with at least 4 decimal places x¯= Answer

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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2. The water and sewage service company of a city in the country randomly selected 120 customers who use this service. In the last month, the value of these invoices, in thousands of $, is reported in the following frequency distribution. The calculated average value of customer invoices is:

Note: Answer with at least 4 decimal places

x¯= Answer

Linf Lsup
ni Ni fi
Xi
24.000 35.875 29.9375 1
1 0.008 0.008
35.875 47.750 41.8125 8
9 0.067 0.075
47.750 59.625 53.6875 19 28 0.158 0.233
59.625 71.500 65.5625 32 60 0.2670.500
71.500 83.375 77.4375 27 87 0.225 0.725
83.375 95.250 89.3125 17 104 0.142 0.867
95.250 107.125 101.1875 14 118 0.117 0.983
107.125119.000113.0625 2 120 0.017 1.000
Transcribed Image Text:Linf Lsup ni Ni fi Xi 24.000 35.875 29.9375 1 1 0.008 0.008 35.875 47.750 41.8125 8 9 0.067 0.075 47.750 59.625 53.6875 19 28 0.158 0.233 59.625 71.500 65.5625 32 60 0.2670.500 71.500 83.375 77.4375 27 87 0.225 0.725 83.375 95.250 89.3125 17 104 0.142 0.867 95.250 107.125 101.1875 14 118 0.117 0.983 107.125119.000113.0625 2 120 0.017 1.000
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