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The table you provided represents employee satisfaction levels, with categories ranging from "Very Unsatisfied" to "Very Satisfied." The column titled "Trung bình" (average) shows a value of 3.87, which is calculated based on employee satisfaction levels. Let's break down how the average is calculated using the data provided.

### Data in the table:
- **Category 1 (Very Unsatisfied):** 0 employees
- **Category 2 (Unsatisfied):** 0 employees
- **Category 3 (Neutral):** 1 employee
- **Category 4 (Satisfied):** 10 employees
- **Category 5 (Very Satisfied):** 47 employees

### Formula for Weighted Average:
To calculate the average satisfaction score, we use the weighted average formula:
\[
\text{Average} = \frac{\sum (\text{Frequency of each category} \times \text{Category value})}{\sum (\text{Total employees})}
\]

### Steps:
1. Multiply the number of employees in each category by the respective category number (1 for Very Unsatisfied, 2 for Unsatisfied, etc.).
2. Add the results.
3. Divide by the total number of employees.

### Calculation:
\[
\text{Average} = \frac{(0 \times 1) + (0 \times 2) + (1 \times 3) + (10 \times 4) + (47 \times 5)}{0 + 0 + 1 + 10 + 47}
\]
\[
\text{Average} = \frac{(0) + (0) + (3) + (40) + (235)}{58} = \frac{278}{58} \approx 3.87
\]

Thus, the average employee satisfaction score is 3.87, as shown in the table.

Let me know if you'd like more details on this, and here are some related questions for deeper understanding:

1. How is the weighted average different from the simple average?
2. What factors might cause a shift in employee satisfaction scores?
3. How can you analyze the satisfaction trend over time using such data?
4. What role does sample size play in interpreting this average score?
5. How could this average be used to inform management decisions?

**Tip:** When analyzing averages, always consider how much each category contributes to the total result by looking at the distribution of responses.

Learn how to calculate the weighted average for employee satisfaction levels. This example uses a 5-point scale with employee responses distributed across satisfaction categories from 'Very Unsatisfied' to 'Very Satisfied.' The total weighted average score is calculated as 3.87.

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