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

Question

15, 18, 21, 19, 20

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

(1 point)

Answer 1

To calculate the final average height of the five plants, you can use the formula for the average:

\[ \text{Average} = \frac{\text{Sum of all heights}}{\text{Number of plants}} \]

First, sum the heights of the plants:

\[ 15 + 18 + 21 + 19 + 20 = 93 \]

Next, divide the sum by the number of plants (which is 5):

\[ \text{Average} = \frac{93}{5} = 18.6 \]

Thus, the final average height for this group of plants is

\[ \boxed{18.6} \text{ cm} \]