A data has 19 observation arranged in ascending order. Which observation reprsent the median.

Answer

To find the median of a data set with 19 observations arranged in ascending order, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Total Number of Observations (n)**:
- We have a total of 19 observations.
- So, \( n = 19 \).

2. **Use the Median Formula**:
- The formula to find the median in a data set is given by:
\[ \text{Median} = \frac{n + 1}{2} \text{th term} \]

3. **Substitute the Value of n**:
- Substitute \( n = 19 \) into the formula:
\[ \text{Median} = \frac{19 + 1}{2} \text{th term} \]

4. **Calculate the Value**:
- Calculate \( 19 + 1 = 20 \).
- Now divide by 2:
\[ \text{Median} = \frac{20}{2} \text{th term} = 10 \text{th term} \]

5. **Conclusion**:
- Therefore, the observation that represents the median is the **10th term**.

### Final Answer:
The median is represented by the **10th observation**.