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Example 49.5

 

Example 49.5: (Use the table below which summarizes the results of a 2004 study) Find the probability of a single randomly selected subject being very happy given that he/she earns $90,000 and over per year.   Then find the probability that a randomly selected individual is very happy given that he/she earns under $20,000.   What can we conclude?

Study on Global Happiness

Response

Under $20,000

$20,000-$49,000

$50,000- $89,999

$90,000 and over

Total

Not too Happy

55

64

20

6

145

Pretty Happy

192

280

129

55

656

Very Happy

70

149

108

45

372

Total

317

493

257

106

1173

 

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