The contingency table below shows the results of a survey of video viewing habits by age.   Viewer Age Video Viewing Platform Preferred Row Total Mobile/Laptop Device TV Screen 18 to 34 36 26 62 35 to 54 12 12 24 55+ 4 10 14 Column Total 52 48 100   Find the following probabilities or percentages:   (a) Probability that a viewer is aged 18 to 34. (Round your answer to 2 decimal places.)       (b) Probability that a viewer prefers watching videos on a TV screen. (Round your answer to 2 decimal places.)       (c) Percentage of viewers who are 18 to 34 and prefer videos on a mobile or laptop device.       (d) Percentage of viewers given they are 18 to 34 who prefer videos on a mobile or laptop device. (Round your answer to 2 decimal places.)       (e) Percentage of viewers who are 35 to 54 or prefer videos on a mobile or laptop device.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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The contingency table below shows the results of a survey of video viewing habits by age.
 

Viewer Age Video Viewing Platform Preferred Row Total
Mobile/Laptop Device TV Screen
18 to 34 36 26 62
35 to 54 12 12 24
55+ 4 10 14
Column Total 52 48 100

 
Find the following probabilities or percentages:
 
(a) Probability that a viewer is aged 18 to 34. (Round your answer to 2 decimal places.)
 

 


 
(b) 
Probability that a viewer prefers watching videos on a TV screen. (Round your answer to 2 decimal places.)
 

 

 



(c) Percentage of viewers who are 18 to 34 and prefer videos on a mobile or laptop device.

 

 


 
(d) 
Percentage of viewers given they are 18 to 34 who prefer videos on a mobile or laptop device. (Round your answer to 2 decimal places.)

 

 


 
(e) 
Percentage of viewers who are 35 to 54 or prefer videos on a mobile or laptop device.

 

 
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