Final answer:
To calculate the average height of the control group and the experimental group, add up all the heights and divide by the number of plants in each group. Round the averages to the nearest whole number.
Step-by-step explanation:
To calculate the average height of the control group and the experimental group, you need to use the sample mean height of plants for each group. The control group is the group that did not receive any food, while the experimental group is the group that did receive food. Use a calculator to find the mean height of each group by adding up all the heights and dividing by the number of plants in each group. Round the averages to the nearest whole number.
For example, if the control group has 10 plants with heights of 20, 22, 18, 19, 21, 20, 20, 23, 21, and 18 inches, you would calculate the average by adding these heights and dividing by 10: (20 + 22 + 18 + 19 + 21 + 20 + 20 + 23 + 21 + 18) ÷ 10 = 202 ÷ 10 = 20.2. Therefore, the average height of the control group is 20 inches.
Repeat the same process for the experimental group using the provided heights. Once you have the averages for both groups, round them to the nearest whole number to find the average height of each group to the nearest 1 inch.