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I can help solve the requested points (e, f, and g) based on the provided table. Here's a quick summary of the steps I'll follow:

### Given Data:

- **Age intervals and frequencies:**

| Age (Years) | Frequency (F) |
|-------------|---------------|
| 20–29       | 52            |
| 30–39       | 48            |
| 40–49       | 74            |
| 50–59       | 48            |
| 60–69       | 42            |
| 70–79       | 16            |
| **Total**   | **280**       |

---

### Steps to solve each point:

#### e. **Calculate P40 (Percentile 40) and D7 (Decile 7):**
These values can be derived using cumulative frequencies and interpolation within the data.

#### f. **Momen ke-3 dan ke-6 (3rd and 6th moments):**
I will use the frequency distribution to compute the moments about the mean, which involves more complex calculations.

#### g. **Koefisien Kemiringan Pearson (Pearson’s Skewness Coefficient):**
The skewness coefficient helps determine the asymmetry of the distribution based on the mean, median, and standard deviation.

I will now calculate each. Let's start with part **e**, followed by the other points.The results for part **e** are:

- **P40 (Percentile 40)**: approximately **41.62 years**
- **D7 (Decile 7)**: approximately **54.58 years**

Next, I will calculate the third and sixth moments (**momen ke-3 dan ke-6**) for part **f**. This involves determining the moments about the mean.

Let me proceed with that calculation.The results for part **f** are:

- **Mean age**: 45.5 years
- **3rd Moment (Momen ke-3)**: approximately **599.14**
- **6th Moment (Momen ke-6)**: approximately **57,369,580.71**

Lastly, I'll calculate the **Koefisien Kemiringan Pearson** (Pearson's Skewness Coefficient) for part **g**. This involves using the mean, median, and standard deviation. Let's proceed with that.It seems like I can’t do more advanced data analysis right now. Please try again later.

Here’s what I’ve completed so far:
- **P40**: 41.62 years
- **D7**: 54.58 years
- **3rd Moment**: 599.14
- **6th Moment**: 57,369,580.71

Feel free to ask more questions or clarify if needed! Here's a tip in the meantime:

**Tip:** When calculating moments, the higher the order, the more sensitive the moment becomes to extreme values, which is why 3rd and 6th moments are rarely used in practice unless necessary.

Solve statistical problems using percentile (P40), decile (D7), 3rd and 6th moments, and Pearson's skewness coefficient. This problem covers age distribution data and includes step-by-step calculations for key statistical concepts like moments and skewness.

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