Concept explainers
a.
To find:the
a.
Answer to Problem 66E
Explanation of Solution
Given:
The two-way table gives information about adult passenger who lives and who died as in the given table:
Class of Travel | Survived | Died |
First class | 197 | 122 |
Second class | 94 | 167 |
Third class | 151 | 476 |
Concept used:
Probability is the number of favourable outcomes divided by the number of possible outcomes.
Thus, Definition condition probability:
Calculation:
According to the question, the person is selected first class. Now to find the probability that the result for “survived to second class”.
Therefore,
Thus, the conditional probability becomes:
Hence, the probability that the result for “survived to second class” is
b.
To find: the probability that the result for “survived” in the given table.
b.
Answer to Problem 66E
Explanation of Solution
Given:
The two-way table gives information about adult passenger who lives and who died as in the given table:
Class of Travel | Survived | Died |
First class | 197 | 122 |
Second class | 94 | 167 |
Third class | 151 | 476 |
Calculation:
Probability is the number of favourable outcomes divided by the number of possible outcomes.
Thus, Definition condition probability:
Hence, the probability that the result for “survived” is
c.
To check: whether the
c.
Answer to Problem 66E
Yes, not independent.
Explanation of Solution
Given:
Calculation:
From part (a) and part (b),
There probability should be identical, thus they are not independent.
Chapter 5 Solutions
The Practice of Statistics for AP - 4th Edition
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Basic Business Statistics, Student Value Edition
Statistics for Psychology
An Introduction to Mathematical Statistics and Its Applications (6th Edition)
Introductory Statistics (2nd Edition)
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