The arithmetic mean of the following data is __________.

23, 17, 20, 19, 21

Question

The arithmetic mean of the following data is __________.

23, 17, 20, 19, 21

Accepted Answer

**Solution:**

1. Calculate the sum of the observations:
   - $23 + 17 + 20 + 19 + 21 = 100$

2. Count the number of observations:
   - There are $5$ observations.

3. Calculate the arithmetic mean using the formula:
   $$	ext{Arithmetic Mean} = \frac{	ext{Sum of observations}}{	ext{Number of observations}} = \frac{100}{5} = 20$$

**Answer:** $20$

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