Simple random sampling uses a sample of size n from a population of size N to obtain data that can be used to make inferences about the characteristics of a population. Suppose that, from a population of 52 bank accounts, we want to take a random sample of four accounts in order to learn about the population. How many different random samples of four accounts are possible?

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### Understanding Simple Random Sampling

**Objective:** Learn how to determine the number of possible random samples from a population.

**Example Problem:**

Simple random sampling uses a sample of size \( n \) from a population of size \( N \) to obtain data that can be used to make inferences about the characteristics of a population. Suppose that, from a population of **52** bank accounts, we want to take a random sample of **four** accounts in order to learn about the population. How many different random samples of four accounts are possible?

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#### Answering the Problem:

**Steps to determine the number of different random samples:**

1. Identify the size of the population, \( N \). 
   - In this case, \( N = 52 \) bank accounts.
   
2. Determine the size of the sample, \( n \).
   - Here, \( n = 4 \) bank accounts.

3. Use the combination formula to find the number of different random samples:
   \[
   \binom{N}{n} = \frac{N!}{n!(N-n)!}
   \]

4. Substitute the values into the formula:
   \[
   \binom{52}{4} = \frac{52!}{4!(52-4)!} = \frac{52!}{4! \cdot 48!}
   \]

5. Calculate the value to get the number of possible samples.

**Tools for Assistance:**

- Click **Read It** for step-by-step instructions on solving similar problems.
- Click **Watch It** for a video explanation.
- Click **Master It** to practice additional problems and reinforce understanding.

---

#### Optional: Show My Work

What steps or reasoning did you use? Your work may add bonus points toward your score.

You can submit "show my work" an unlimited number of times.

---

#### Additional Resources:

- **My Notes:** Keep track of your progress and notes.
- **Ask Your Teacher:** Seek help directly from your instructor.
- **Practice Another Version:** Try similar problems to practice and improve your skills.

**Uploads:**
- You have the option to upload files if needed, with a limit of 10 files maximum.

---

This educational content is designed to help students understand the concept of simple random sampling and how to apply mathematical formulas to solve sampling problems effectively.

---
Transcribed Image Text:--- ### Understanding Simple Random Sampling **Objective:** Learn how to determine the number of possible random samples from a population. **Example Problem:** Simple random sampling uses a sample of size \( n \) from a population of size \( N \) to obtain data that can be used to make inferences about the characteristics of a population. Suppose that, from a population of **52** bank accounts, we want to take a random sample of **four** accounts in order to learn about the population. How many different random samples of four accounts are possible? --- #### Answering the Problem: **Steps to determine the number of different random samples:** 1. Identify the size of the population, \( N \). - In this case, \( N = 52 \) bank accounts. 2. Determine the size of the sample, \( n \). - Here, \( n = 4 \) bank accounts. 3. Use the combination formula to find the number of different random samples: \[ \binom{N}{n} = \frac{N!}{n!(N-n)!} \] 4. Substitute the values into the formula: \[ \binom{52}{4} = \frac{52!}{4!(52-4)!} = \frac{52!}{4! \cdot 48!} \] 5. Calculate the value to get the number of possible samples. **Tools for Assistance:** - Click **Read It** for step-by-step instructions on solving similar problems. - Click **Watch It** for a video explanation. - Click **Master It** to practice additional problems and reinforce understanding. --- #### Optional: Show My Work What steps or reasoning did you use? Your work may add bonus points toward your score. You can submit "show my work" an unlimited number of times. --- #### Additional Resources: - **My Notes:** Keep track of your progress and notes. - **Ask Your Teacher:** Seek help directly from your instructor. - **Practice Another Version:** Try similar problems to practice and improve your skills. **Uploads:** - You have the option to upload files if needed, with a limit of 10 files maximum. --- This educational content is designed to help students understand the concept of simple random sampling and how to apply mathematical formulas to solve sampling problems effectively. ---
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