Concept explainers
a.
To explain: The random variable X being binomial random variable.
a.
Explanation of Solution
Given:
Number of trials ( n ) = 500
The random variable X being binomial random variable:
- There are two successes and failures, that is, visit to auction and no visit to auction.
- Males are independent of each other.
- Number of males are fixed.
- Probability of selecting individual is fixed.
Since, all the required condition for a binomial distribution are fixed. Thus, the variable X is a binomial random variable.
b.
To check: The condition for normal approximation.
b.
Explanation of Solution
Calculation:
The conditions for normal approximation are:
Thus, normal approximation to binomial distribution could be used.
c.
To find: The probability of at least 235 men.
c.
Answer to Problem 91E
The probability is 0.9099.
Explanation of Solution
Calculation:
The probability of at least 235 men is computed as:
Thus, the required probability is 0.9099.
Chapter 6 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Basic Business Statistics, Student Value Edition (13th Edition)
Introductory Statistics
Statistics for Business and Economics (13th Edition)
Introductory Statistics (10th Edition)
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