councilor is concerned about the percentage of city residents who express disapproval of her performance. Her political committee pays for a newspaper ad, hoping to keep her disapproval rating below 21%. What is the parameter?     a. average of all residents b. disapproval rating below 21% c. political committee paying a newspaper ad d. percentage of city residents who express disapproval

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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A councilor is concerned about the percentage of city residents who express disapproval of her performance. Her political committee pays for a newspaper ad, hoping to keep her disapproval rating below 21%. What is the parameter?
 
 
a. average of all residents
b. disapproval rating below 21%
c. political committee paying a newspaper ad
d. percentage of city residents who express disapproval
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