Assume you have a binomial distribution. In an experiment with 100 trials and a probability of a success equal to one half, what is the standard deviation?
Assume you have a binomial distribution. In an experiment with 100 trials and a probability of a success equal to one half, what is the standard deviation?
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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![**Probability and Statistics: Binomial Distribution**
_Assume you have a binomial distribution. In an experiment with 100 trials and a probability of a success equal to one half, what is the standard deviation?_
To find the standard deviation of a binomial distribution, we can use the formula:
\[ \sigma = \sqrt{n \cdot p \cdot (1 - p)} \]
where:
- \( n \) is the number of trials.
- \( p \) is the probability of success in a single trial.
Given that:
\[ n = 100 \]
\[ p = \frac{1}{2} \]
We substitute the values into the formula:
\[ \sigma = \sqrt{100 \cdot \frac{1}{2} \cdot \left(1 - \frac{1}{2}\right)} \]
\[ \sigma = \sqrt{100 \cdot \frac{1}{2} \cdot \frac{1}{2}} \]
\[ \sigma = \sqrt{100 \cdot \frac{1}{4}} \]
\[ \sigma = \sqrt{25} \]
\[ \sigma = 5 \]
Therefore, the standard deviation of the binomial distribution under the given conditions is 5.
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Transcribed Image Text:**Probability and Statistics: Binomial Distribution**
_Assume you have a binomial distribution. In an experiment with 100 trials and a probability of a success equal to one half, what is the standard deviation?_
To find the standard deviation of a binomial distribution, we can use the formula:
\[ \sigma = \sqrt{n \cdot p \cdot (1 - p)} \]
where:
- \( n \) is the number of trials.
- \( p \) is the probability of success in a single trial.
Given that:
\[ n = 100 \]
\[ p = \frac{1}{2} \]
We substitute the values into the formula:
\[ \sigma = \sqrt{100 \cdot \frac{1}{2} \cdot \left(1 - \frac{1}{2}\right)} \]
\[ \sigma = \sqrt{100 \cdot \frac{1}{2} \cdot \frac{1}{2}} \]
\[ \sigma = \sqrt{100 \cdot \frac{1}{4}} \]
\[ \sigma = \sqrt{25} \]
\[ \sigma = 5 \]
Therefore, the standard deviation of the binomial distribution under the given conditions is 5.
There are no graphs or diagrams in this image.
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