Refer to the contingency table shown below.
Smoking by Race for Males Aged 18-24 | |||||||||
Smoker (S) |
Nonsmoker (N) |
Row Total | |||||||
White (W) | 289 | 571 | 860 | ||||||
Black (B) | 50 | 90 | 140 | ||||||
Column Total | 339 | 661 | 1,000 | ||||||
Click here for the Excel Data File
(a) Calculate the probabilities given below: (Round your answers to 4 decimal places.)
i. | P(S) | ||
ii. | P(W) | ||
iii. | P(S | W) | ||
iv. | P(S | B) | ||
v. | P(S and W) | ||
vi. | P(N and B) | ||
(b) Do you see evidence that smoking and race are not independent?
(c) Why might public health officials be interested in this type of data?
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