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Anvi measured the height of five plants over a three-week experimental period and obtained the following data for the final week (in cm):

15, 18, 21, 19, 20

Calculate the final average height for this group of plants. Round your answer to one decimal place.

(1 point)
Responses

4.2 cm
4.2 cm

18.6 cm
18.6 cm

6.0 cm
6.0 cm

13.3 cm

1 answer

To calculate the average height of the five plants, you need to sum the heights and then divide by the number of plants.

The heights given are: 15 cm, 18 cm, 21 cm, 19 cm, and 20 cm.

  1. Calculate the sum of the heights: \( 15 + 18 + 21 + 19 + 20 = 93 \) cm

  2. Divide the sum by the number of plants (which is 5): \( \text{Average height} = \frac{93}{5} = 18.6 \) cm.

So, the final average height for this group of plants is 18.6 cm.