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According to the 2000 U.S. Census Bureau, [tex]$49.65\%$[/tex] of Texas residents were male.

Consider the experiment of selecting ten Texans at random. If you are interested in determining the probability of selecting [tex]$x$[/tex] males, is this a binomial probability distribution? If so, what are the values of [tex]$n$[/tex], [tex]$p$[/tex], and [tex]$q$[/tex]?

A. Yes; [tex]$n=0.4965, p=10, q=0.5035$[/tex]
B. No
C. Yes; [tex]$n=0.5035, p=10, q=0.4965$[/tex]
D. Yes; [tex]$n=10, p=0.4965, q=0.5035$[/tex]

Please select the best answer from the choices provided.


Sagot :

Certainly! Let's break down the problem step-by-step to determine if this scenario fits a binomial probability distribution and, if so, what the values of [tex]\( n \)[/tex], [tex]\( p \)[/tex], and [tex]\( q \)[/tex] should be.

### Binomial Probability Distribution:

A binomial probability distribution is appropriate if the following conditions are met:
1. The experiment consists of a fixed number of trials, [tex]\( n \)[/tex].
2. Each trial has only two outcomes: success or failure.
3. The probability of success, [tex]\( p \)[/tex], is the same for each trial.
4. The trials are independent.

In this case:
1. The experiment is selecting ten Texans at random, so the number of trials [tex]\( n = 10 \)[/tex].
2. We are interested in whether each selected person is male (success) or not (failure), satisfying the two outcomes condition.
3. According to the Census, [tex]\( 49.65\% \)[/tex] of Texas residents were male, thus the probability of selecting a male, [tex]\( p \)[/tex], is [tex]\( 0.4965 \)[/tex].
4. Each selection is independent of the others.

Therefore, this experiment fits the criteria for a binomial probability distribution.

### Parameters of the Binomial Distribution:

- [tex]\( n \)[/tex]: the number of trials.
- [tex]\( p \)[/tex]: the probability of success (selecting a male).
- [tex]\( q \)[/tex]: the probability of failure, which is [tex]\( 1 - p \)[/tex].

Given these:
- [tex]\( n = 10 \)[/tex]
- [tex]\( p = 0.4965 \)[/tex]
- [tex]\( q = 1 - 0.4965 = 0.5035 \)[/tex]

### Conclusion:
The correct parameters for this binomial distribution, given the problem statement, are:
- [tex]\( n = 10 \)[/tex]
- [tex]\( p = 0.4965 \)[/tex]
- [tex]\( q = 0.5035 \)[/tex]

Therefore, the correct answer is:
1. Yes; [tex]\( n = 10 \)[/tex], [tex]\( p = 0.4965 \)[/tex], [tex]\( q = 0.5035 \)[/tex]

Hence, the best answer from the given choices is D.
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