The probability is 0.3 that a traffic fatality involves an intoxicated or alcohol-impaired driver or nonoccupant. In six traffic fatalities, find the probability that the number, Y, which involve an intoxicated or alcohol-impaired driver or nonoccupant is a. exactly three; at least three; at most three. b. between two and four, inclusive. c. Find and interpret the mean of the random variable Y. d. Obtain the standard deviation of Y. CI a. The probability that exactly three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is. (Round to four decimal places as needed.) torrect

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**Probability Problem: Traffic Fatalities and Alcohol Impairment**

**Problem Statement:**
The probability is 0.3 that a traffic fatality involves an intoxicated or alcohol-impaired driver or nonoccupant. In six traffic fatalities, find the probability that the number, Y, which involves an intoxicated or alcohol-impaired driver or nonoccupant is:

a. exactly three,
b. at least three,
c. at most three,
d. between two and four, inclusive,
e. Find and interpret the mean of the random variable Y,
f. Obtain the standard deviation of Y.

**Instructions for Part (a):**
a.”The probability that exactly three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is ______ (Round to four decimal places as needed.)”

**Solution Steps:**
1. Identify the parameters of the binomial distribution:
   - Probability of success (p): 0.3
   - Number of trials (n): 6
   - Number of successes (k): Variable, depending on which part of the problem you are solving.

2. Use the binomial probability formula for the specific scenarios provided in the problem statement.

**Details and Instructions:**
- Use a calculator or statistical software to compute the probabilities accurately.
- For part (a), calculate using the formula for exactly three successes:
  \[
  P(X = 3) = \binom{6}{3} (0.3)^3 (0.7)^{(6-3)}
  \]

**Graph/Diagram Explanation:**
No graphs or diagrams are present in the image. However, understanding the binomial distribution graphically can help:
- Consider a histogram where the x-axis represents the number of intoxicated fatalities (from 0 to 6).
- The y-axis represents the probability of each outcome.

**Important Concepts:**
- **Binomial Distribution:** A probability distribution that summarizes the likelihood that a value will take one of two independent states and is commonly used for scenarios like the given problem.
- **Mean of a Binomial Distribution (μ):** Calculated as \( n \times p \).
- **Standard Deviation of a Binomial Distribution (σ):** Calculated as \( \sqrt{n \times p \times (1-p)} \).

By applying these principles, you can solve the entire problem systematically. Ensure to round your answers as specified.
Transcribed Image Text:**Probability Problem: Traffic Fatalities and Alcohol Impairment** **Problem Statement:** The probability is 0.3 that a traffic fatality involves an intoxicated or alcohol-impaired driver or nonoccupant. In six traffic fatalities, find the probability that the number, Y, which involves an intoxicated or alcohol-impaired driver or nonoccupant is: a. exactly three, b. at least three, c. at most three, d. between two and four, inclusive, e. Find and interpret the mean of the random variable Y, f. Obtain the standard deviation of Y. **Instructions for Part (a):** a.”The probability that exactly three traffic fatalities involve an intoxicated or alcohol-impaired driver or nonoccupant is ______ (Round to four decimal places as needed.)” **Solution Steps:** 1. Identify the parameters of the binomial distribution: - Probability of success (p): 0.3 - Number of trials (n): 6 - Number of successes (k): Variable, depending on which part of the problem you are solving. 2. Use the binomial probability formula for the specific scenarios provided in the problem statement. **Details and Instructions:** - Use a calculator or statistical software to compute the probabilities accurately. - For part (a), calculate using the formula for exactly three successes: \[ P(X = 3) = \binom{6}{3} (0.3)^3 (0.7)^{(6-3)} \] **Graph/Diagram Explanation:** No graphs or diagrams are present in the image. However, understanding the binomial distribution graphically can help: - Consider a histogram where the x-axis represents the number of intoxicated fatalities (from 0 to 6). - The y-axis represents the probability of each outcome. **Important Concepts:** - **Binomial Distribution:** A probability distribution that summarizes the likelihood that a value will take one of two independent states and is commonly used for scenarios like the given problem. - **Mean of a Binomial Distribution (μ):** Calculated as \( n \times p \). - **Standard Deviation of a Binomial Distribution (σ):** Calculated as \( \sqrt{n \times p \times (1-p)} \). By applying these principles, you can solve the entire problem systematically. Ensure to round your answers as specified.
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