Two of a Kind Follow the outline presented in Problem 67 to determine the probability of being dealt exactly one pair.
Table of contents
- 1. Intro to Stats and Collecting Data1h 14m
- 2. Describing Data with Tables and Graphs1h 55m
- 3. Describing Data Numerically2h 5m
- 4. Probability2h 16m
- 5. Binomial Distribution & Discrete Random Variables3h 6m
- 6. Normal Distribution and Continuous Random Variables2h 11m
- 7. Sampling Distributions & Confidence Intervals: Mean3h 23m
- Sampling Distribution of the Sample Mean and Central Limit Theorem19m
- Distribution of Sample Mean - Excel23m
- Introduction to Confidence Intervals15m
- Confidence Intervals for Population Mean1h 18m
- Determining the Minimum Sample Size Required12m
- Finding Probabilities and T Critical Values - Excel28m
- Confidence Intervals for Population Means - Excel25m
- 8. Sampling Distributions & Confidence Intervals: Proportion1h 25m
- 9. Hypothesis Testing for One Sample3h 29m
- 10. Hypothesis Testing for Two Samples4h 50m
- Two Proportions1h 13m
- Two Proportions Hypothesis Test - Excel28m
- Two Means - Unknown, Unequal Variance1h 3m
- Two Means - Unknown Variances Hypothesis Test - Excel12m
- Two Means - Unknown, Equal Variance15m
- Two Means - Unknown, Equal Variances Hypothesis Test - Excel9m
- Two Means - Known Variance12m
- Two Means - Sigma Known Hypothesis Test - Excel21m
- Two Means - Matched Pairs (Dependent Samples)42m
- Matched Pairs Hypothesis Test - Excel12m
- 11. Correlation1h 24m
- 12. Regression1h 50m
- 13. Chi-Square Tests & Goodness of Fit2h 21m
- 14. ANOVA1h 57m
4. Probability
Multiplication Rule: Dependent Events
Problem 3.2.23b
Textbook Question
"Using the Multiplication Rule In Exercises 19-32, use the Multiplication Rule.
23. Celebrities as Role Models In a sample of 1103 probable voters, three out of four say they would like entertainers to address social and political issues. Two probable voters are selected at random. (Source: The Hollywood Reporter)
b. Find the probability that neither probable voter would like entertainers to address social and political issues."
Verified step by step guidance1
Step 1: Understand the problem. We are tasked with finding the probability that neither of the two randomly selected probable voters would like entertainers to address social and political issues. This involves using the Multiplication Rule for independent events.
Step 2: Identify the probability of a single voter not wanting entertainers to address social and political issues. From the problem, three out of four voters (or 75%) would like entertainers to address these issues. Therefore, the probability of a voter not wanting entertainers to address these issues is 1 - 0.75 = 0.25.
Step 3: Recognize that the two voters are selected independently. This means the probability of both events occurring (neither voter wanting entertainers to address social and political issues) can be calculated by multiplying the probabilities of the individual events.
Step 4: Apply the Multiplication Rule. The probability of neither voter wanting entertainers to address social and political issues is given by: . This represents the product of the probabilities for each voter.
Step 5: Simplify the expression. The result of will give the final probability. You can calculate this value to find the numerical result.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Multiplication Rule
The Multiplication Rule in probability states that the probability of two independent events both occurring is the product of their individual probabilities. This rule is essential when calculating the likelihood of multiple outcomes happening together, especially in scenarios involving random selections.
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Multiplication Rule: Dependent Events
Independent Events
Independent events are those whose outcomes do not affect each other. In the context of this question, the selection of one probable voter does not influence the selection of another. Understanding independence is crucial for applying the Multiplication Rule correctly.
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Probability of Multiple Independent Events
Complementary Probability
Complementary probability refers to the likelihood of an event not occurring. In this case, if three out of four voters support entertainers addressing issues, the probability that a voter does not support this is one minus that probability. This concept is vital for calculating the probability that neither of the two selected voters supports the idea.
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Complementary Events
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