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Why would it not be possible to obtain the frequency distribution for these data classes?

Why would it not be possible to obtain the frequency distribution for these data classes?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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We have a sample of literacy rates across 135 countries, with each observation the percentage of the adult population which can read, and write for one of the countries. Why would it not be possible to obtain the frequency distribution for these data classes?

  • Less than 30
  • At least 30, but less than 50
  • At least 45, but less than 70
  • At least 70, but less than 90
  • At least 85

a) The data classes have different ranges

b) Some observations could lie in two data classes

c) There is no maximum value in the fifth data class

d) There is no minimum value in the first data class

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