The contingency table below shows the results of a survey of video viewing habits by age. Find
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Question:
The contingency table below shows the results of a survey of video viewing habits by age. Find the following probabilities or percentages:
Video viewing platform preferred
Viewer Age
Mobile/laptop device
TV screen
Row total
18-34
55
50
105
35-54
25
22
47
55+
15
25
40
Column total
95
97
192
(1) Probability that a viewer is aged 18-34.
(2) Probability that a viewer prefers watching videos on a TV screen.
(3) Percentage of viewers who are 18-34 and prefer videos on a mobile or laptop device.
(4) Percentage of viewers aged 18-34 given that viewers prefer videos on a mobile or laptop device.
(5) Percentage of viewers who are 35-54 or prefer videos on a mobile or laptop device.
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