Question

question 10 of 10
the table shows data for two groups of plants, one grown with fertilizer and the other without fertilizer.
effect of fertilizer on plant growth

	no fertilizer	fertilizer
	25.9	32.1
	25.4	40.6
	24.1	30.5
	35.6	33.8

what is the mean height of the plants given fertilizer?
a. 33.5 cm
b. 27.0 cm
c. 30.5 cm
d. 32.1 cm

Explanation:

Step1: Identify data for fertilized plants

The data for plants with fertilizer is 30.5, 32.1, 40.6, 30.5, 33.8.

Step2: Calculate the sum

$30.5 + 32.1+40.6 + 30.5+33.8=167.5$

Step3: Determine number of data - points

There are 5 data - points for plants with fertilizer.

Step4: Calculate the mean

The mean $\bar{x}=\frac{167.5}{5}=33.5$

Answer:

A. 33.5 cm