D

Aubree wanted to see if there is a connection between the day a given exam takes place and the average score of the exam. She collected data about all the exams from the previous year and arranged the average scores of the exams according to the day they took place as shown below. Which statement is the most accurate interpretation of the data?

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Anonymous
0


A. There is a clear positive relationship between the variable, x, the day and variable, y, the average scores.

B. There is a clear negative relationship between the variable, x, the day and variable, y, the average scores .

C. There is no clear relationship between the variable, x, the day and variable, y, the average scores.


Sangeetha Pulapaka
0

Option C is the correct answer. There is no clear relationship or no correlation between the variables. This is because the points are scattered all over the scatter plot. They are just a series of dots with no visible trend. The points are randomly arranged all over the graph, so there is no clear relationship between the day the exam is taken and the average score obtained.

Skills you may want to recall:

Correlation and scatter plots

https://www.khanacademy.org/math/statistics-probability/describing-relationships-quantitative-data/introduction-to-scatterplots/a/scatterplots-and-correlation-review#:~:text=When%20the%20y%20variable%20tends%20to%20decrease%20as%20the%20x,negative%20correlation%20between%20the%20variables.&text=When%20there%20is%20no%20clear,correlation%20between%20the%20two%20variables.