Question

2. You are evaluating the effect of different types of fertilizers on plant growth. You plant 12 tomato plants and divide them into three groups, where each group contains four plants. To the first group, you do not add fertilizer and the plants are watered with plain water. The second and third groups are watered with two different concentrations of the same type of fertilizer. After three weeks, you check the growth by measuring the heights of each plant in centimeters and calculate the average growth for each concentration of fertilizer. The collected data was then presented in the table below. Table 1: The effect of different concentration of fertilizer on tomato plant growth over three weeks Treatment No treatment 50 M 100 M Plant Number 1 10 15 22 2 12 16 25 3 8 14 21 4 9 12 27 Average 9.75 14.25 23.75 1. Study the table and detect some errors. (03) 2. Provide the calculation which resulted to the average of the heights of the plants treated with pure water. (04) 3. Consider the averages of heights of plants to plot a complete labelled graph using Microsoft excel. (06)​

Answer 1

The average is used to provide a central value that represents different values to make an analysis or a comparation. The attached image shows a plot comparing the averages of plants growth.

What is an average?

In simple words, the average is the addition of a group of values divided by n, which is the total number of values considered. It is also known as media.

It is used to provide a single central value that represents several different values.

Group of values: X₁, X₂, X₃, X₄, X₅

n = 5  

Average = (X₁ + X₂ + X₃ + X₄ + X₅) / 5

In the exposed example,

1) In the attached files you will find the image of the table.

According to this image, there is no errors. You should compare this table with yours and analyze if there is any difference.  

2) Average of the heights of the plants treated with pure water

Group of values: 10, 12, 8, 9

n = 4

Average = (10 + 12 + 8 + 9) / 4 = 39/4 = 9.75

3) You will find the graph in the attached files.

In these graphs you will find

• a combined graph in which it is detailed the growth of each plant together with the average growth per treatment.

• another bar graph only representing the averages of heights of plants.

   

You will learn more about average at

brainly.com/question/14855037

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