The contingency table below shows the results of a survey of online video viewin

Question

The contingency table below shows the results of a survey of online video viewing by age Type of Videos Preferred iewer Age 18-34 35-54 55+ User Created 39 10 TV Row Total 30 10 69 20 Column Total 52 48 100 Find the following probabilities or percentages: (a) Probability that a viewer is aged 18-34. Probability Probability that a viewer prefers watching TV videos. Probability (b) (c) Percentage of viewers who are 18-34 and prefer watching user-created videos. Percentage of viewers (d) Percentage of viewers aged 18-34 who prefer watching user-created videos. (Round 2decimal places.) Percentage of viewers (e) Percentage of viewers who are 35-54 or prefer user-created videos. Percentage of viewers

Explanation / Answer

a) P(viewer is aged 18-34) = 69/100

P = 0.69

b) P(viewer prefers TV videos) = 48/100 = 0.48

c) P(18-34 and prefers user created videos) = 39/100 = 0.39 or 39%

d) P(18-34 and prefers user created videos) = 39/69 = 0.5652 or 56.52%

e) P = P(35-54) + P(user created) - P(35-54 and user created)

P = 20/100 + 52/100 - 10/100

P = 62%

d)

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