MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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hw 8
You want to know if nearness to an Acacia tree is associated with a change in ant biomass. You randomly select Acacia trees. At each tree, you count ants in two 1m × 1m squares: one next to the tree and the other square 20 meters from the tree. The graph to the right shows a normal-quantile plot for the number of ants near an Acacia.

(A) Do these data appear to be normally-distributed? *Briefly* explain your answer.

(B) If you could *not* assume normality, what are two strategies you could use for this analysis (be specific, for instance mention the names of a statistical test that you would use).
1.
2.

**Graph Explanation:**

The normal-quantile plot to the right shows how the distribution of the number of ants aligns with a normal distribution. The x-axis is labeled "Data," suggesting measurements of ant numbers, while the y-axis represents quantiles.

The plot shows a deviation from the straight line, indicating that the data may not be normally distributed. Points curve upwards at the start and diverge significantly at higher values, with several outliers. This pattern suggests skewness in the data distribution.
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Transcribed Image Text:You want to know if nearness to an Acacia tree is associated with a change in ant biomass. You randomly select Acacia trees. At each tree, you count ants in two 1m × 1m squares: one next to the tree and the other square 20 meters from the tree. The graph to the right shows a normal-quantile plot for the number of ants near an Acacia. (A) Do these data appear to be normally-distributed? *Briefly* explain your answer. (B) If you could *not* assume normality, what are two strategies you could use for this analysis (be specific, for instance mention the names of a statistical test that you would use). 1. 2. **Graph Explanation:** The normal-quantile plot to the right shows how the distribution of the number of ants aligns with a normal distribution. The x-axis is labeled "Data," suggesting measurements of ant numbers, while the y-axis represents quantiles. The plot shows a deviation from the straight line, indicating that the data may not be normally distributed. Points curve upwards at the start and diverge significantly at higher values, with several outliers. This pattern suggests skewness in the data distribution.
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