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Use the following information to answer the next six exercises. There are 23 countries in North America, 12 countries in South America, 47 countries in Europe, 44 countries in Asia, 54 countries in Africa, and 14 in Oceania (Pacific Ocean region). Let A = the event that a country is in Asia. Let E = the event that a country is in Europe. Let F = the event that a country is in Africa. Let N = the event that a country is in North America. Let O = the event that a country is in Oceania. Let S = the event that a country is in South America. Find P(N).

Short Answer

Expert verified
\( P(N) = \frac{23}{194} \approx 0.1186 \)

Step by step solution

01

Understanding the Problem

The problem asks for the probability of event \( N \), which denotes a country being in North America. We are given the total number of countries in different regions and need to find the probability of selecting a country from North America.
02

Identify the Total Number of Countries

To find the probability, we first need to determine the total number of countries. Sum up the countries from all the regions: 23 (North America) + 12 (South America) + 47 (Europe) + 44 (Asia) + 54 (Africa) + 14 (Oceania).
03

Calculate the Total

Perform the arithmetic to find the total number of countries: \[23 + 12 + 47 + 44 + 54 + 14 = 194\]So, there are 194 countries in total.
04

Determine the Number of Countries in North America

The problem states there are 23 countries in North America, which is the number we will use to represent event \( N \).
05

Calculate the Probability

The probability of a country being in North America is given by the ratio of countries in North America to the total number of countries. So,\[P(N) = \frac{23}{194}\]Compute this fraction to obtain \( P(N) \approx 0.1186 \).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Basic Statistics
Statistics is a field of mathematics focused on collecting, analyzing, interpreting, and presenting data. In the context of the given exercise, we're dealing with a simple statistical setup where we categorize various countries by distinct regions. This forms the basic dataset for our probability calculations. When dealing with data, it's crucial to understand concepts like sample space and events, as they help structure the data for analysis.

- **Sample Space**: This refers to the total set of possible outcomes in a statistical experiment. In this exercise, the sample space is made up of all the countries across different continents.
- **Events**: An event is any subset of a sample space. For instance, in the exercise, events such as A, E, F, N, O, and S represent the countries within specific regions like Asia or Europe.

By grasping these basic statistics concepts, you can better analyze how probabilities function within these defined outcomes.
Probability Calculation
Probability is a measure of the likelihood that a particular event will occur. In simple terms, it's the fraction of favorable outcomes to the total number of possible outcomes in the sample space.

To understand probability calculations, let's dive into the exercise:
- **Identifying Total Outcomes**: The total number of countries provides a total possible outcome figure. This is calculated by adding up all the countries from different regions, which equals 194 as demonstrated in the solution.
- **Favorable Outcomes**: The favorable outcomes, based on the problem, are the number of countries in a specific event, such as North America with 23 countries.
- **Computing Probability**: The probability of selecting a country from North America equals the number of North American countries divided by the total number of countries: \[ P(N) = \frac{23}{194} \approx 0.1186 \]

By understanding these steps, students can effectively conduct probability calculations for varied scenarios in the world of statistics.
Statistical Concepts
Statistical concepts form the backbone of data analysis and interpretation. They offer the tools needed to understand and make predictions about data. Here are some core statistical concepts demonstrated in the exercise:

- **Relative Frequency**: This is essentially what a probability is—a statistical measure representing the likelihood of an event. It reflects how often a particular event occurs within a set of observations, a pivotal concept in probability.
- **Equal Likelihood Assumption**: The probability in this exercise assumes that each country has an equal chance of being picked. This simplifies calculations since every selection from the dataset has the same likelihood of occurrence.
- **Ratio Representation**: Probabilities are often depicted as fractions or ratios, providing a clear analytical view. This helps in comparing how likely one event is to another, as shown with the fraction \( \frac{23}{194} \).

By mastering these statistical concepts, students can extend their understanding to more complex probability theories and statistical analysis, paving the way for deeper data insights.

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