To find the mean height of the plants given fertilizer, we need to follow these steps:
1. List the heights of the plants given fertilizer:
[tex]\[
30.5\ \text{cm},\ 32.1\ \text{cm},\ 40.6\ \text{cm},\ 30.5\ \text{cm},\ 33.8\ \text{cm}
\][/tex]
2. Sum the heights of the plants given fertilizer:
[tex]\[
30.5 + 32.1 + 40.6 + 30.5 + 33.8 = 167.5\ \text{cm}
\][/tex]
3. Count the number of plants given fertilizer:
[tex]\[
5\ \text{plants}
\][/tex]
4. Calculate the mean height by dividing the total height by the number of plants:
[tex]\[
\text{Mean height} = \frac{167.5\ \text{cm}}{5} = 33.5\ \text{cm}
\][/tex]
So, the mean height of the plants given fertilizer is:
B. 33.5 cm
