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(c) \( n=8, p=0.36, X=0 \) \( P(X)=\square, 5 \)

Ask by Luna Fitzgerald. in the United States
Mar 22,2025

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The probability \( P(X) \) is approximately 0.028147.

Solución

To find the probability \( P(X) \) when \( n = 8 \), \( p = 0.36 \), and \( X = 0 \), we can use the binomial probability formula: \[ P(X) = \binom{n}{k} p^k (1-p)^{n-k} \] where: - \( n \) is the number of trials, - \( k \) is the number of successes, - \( p \) is the probability of success in a single trial, - \( X \) is the number of successes. Given: - \( n = 8 \), - \( p = 0.36 \), - \( X = 0 \). We need to find \( P(X) \) when \( X = 0 \), which means there are no successes. Substitute the given values into the formula: \[ P(X) = \binom{8}{0} (0.36)^0 (1-0.36)^{8-0} \] \[ P(X) = 1 \times 1 \times (0.64)^8 \] \[ P(X) = (0.64)^8 \] Now, we can calculate the value of \( P(X) \). Calculate the value by following steps: - step0: Calculate: \(0.64^{8}\) - step1: Convert the expressions: \(\left(\frac{16}{25}\right)^{8}\) - step2: Use the properties of exponents: \(\frac{16^{8}}{25^{8}}\) The probability \( P(X) \) when \( n = 8 \), \( p = 0.36 \), and \( X = 0 \) is approximately 0.028147.

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To find \( P(X=0) \) when \( n=8 \) and \( p=0.36 \), we can use the binomial probability formula: \[ P(X=k) = \binom{n}{k} p^k (1-p)^{n-k} \] For \( k=0 \): \[ P(X=0) = \binom{8}{0} (0.36)^0 (0.64)^8 = 1 \cdot 1 \cdot (0.64)^8 \approx 0.0106 \] Thus, \( P(X=0) \approx 0.0106 \) or about 1.06%. Now let’s think about where this kind of calculation pops up in real life. When dealing with binomial probabilities, such as this example that involves successes and failures, commonly, this is seen in quality control processes. For instance, in a factory, if an item passes a quality check 36% of the time, understanding the likelihood of a batch having no items pass can significantly impact decisions regarding production adjustments or further testing, making statisticians essential for effective operations.

preguntas relacionadas

If events \( A \) and \( B \) are from the same sample space, and if \( P(A)=0.8 \) and \( P(B)=0.9 \), can events \( A \) and \( B \) be mutually exclusive? Explain. Choose the correct answer below. A. All probabilities are less than or equal to 1 and greater than or equal to 0 . If events are mutually exclusive, then \( P(A \cup B)=P(A)+P(B) \). Therefore, if \( A \) and \( B \) are mutually exclusive, \( P(A \cup \) \( \begin{array}{l}B)=P(A)+P(B)=0.8+0.9=1 \text {, which is possible. Therefore, events } A \text { and } B \text { are mutually exclusive. } \\ \text { B. All probabilities are less than or equal to } 1 \text { and greater than or equal to } 0 \text {. If events are mutually exclusive, } \\ \text { then } P(A \cup B)=P(A)+P(B) \text {. Therefore, if } A \text { and } B \text { are mutually exclusive, } P(A \cup\end{array} \) \( B)=P(A)+P(B)=0.8+0.9=0 \), which is possible. Therefore, events \( A \) and \( B \) are mutually exclusive. C. All probabilities are less than or equal to 1 and greater than or equal to 0 . If events are mutually exclusive, then \( P(A \cup B)=P(A)+P(B) \). Therefore, if \( A \) and \( B \) are mutually exclusive, \( P(A \cup \) B \( \begin{array}{l}B)=P(A)+P(B)=0.8+0.9=1.7 \text {, which is impossible. Therefore, events } A \text { and } B \text { are not mutually exclusive. } \\ \text { D. All probabilities are less than or equal to } 1 \text { and greater than or equal to } 0 \text {. If events are mutually exclusive, } \\ \text { then } P(A \cup B)=P(A)+P(B) \text {. Therefore, if } A \text { and } B \text { are mutually exclusive, } P(A \cup \\ B)=P(A)+P(B)=0.8+0.9=1.7 \text {, which is possible. Therefore, events } A \text { and } B \text { are mutually exclusive. }\end{array} \)

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