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The question asks for the **quartile deviation (Simpangan Kuartil)** of the data set:

\[
19, 13, 12, 11, 14, 15, 17, 16, 12
\]

### Step-by-Step Solution:

1. **Arrange the data in ascending order:**

\[
11, 12, 12, 13, 14, 15, 16, 17, 19
\]

2. **Calculate the Quartiles:**
   - The quartile deviation formula is based on the first quartile (Q1) and the third quartile (Q3).
   - **Q1** is the median of the lower half of the data.
   - **Q3** is the median of the upper half of the data.

   In

Simpangan Kuartil dari data 19, 13, 12, 11, 14, 15, 17, 16, 12 adalah?

Hitung simpangan kuartil untuk data 19, 13, 12, 11, 14, 15, 17, 16, 12. Ikuti langkah-langkah untuk mengurutkan data, menghitung Q1 dan Q3, dan menentukan simpangan kuartil dengan rumus yang tepat.

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