An agricultural scientist investigated the effectiveness of a new organic bio-stimulant on the yield of tomato plants. Table 1 shows the increase in fruit yield (measured in kilograms, where a higher value indicates a greater improvement in yield compared to control plots) for 8 experimental plots.

Table 1 Yield improvement (kg) for experimental plots using the bio-stimulant

Plot number	Yield improvement (kg)
1	7
2	11
3	5
4	13
5	4
6	14
7	6
8	7

Calculate the mean yield improvement for the experimental plots. Give your answer to two significant figures. Show your workings.

Table 1 Yield improvement (kg) for experimental plots using the bio-stimulant

Plot number	Yield improvement (kg)
1	7
2	11
3	5
4	13
5	4
6	14
7	6
8	7

Calculate the mean yield improvement for the experimental plots. Give your answer to two significant figures. Show your workings.

Data handling and analysis

Question 56

Markscheme

Data handling and analysis

Question 56

Markscheme

Data handling and analysis

Question 56

Data handling and analysis Questions

Data handling and analysis

Question 56

Data handling and analysis Questions