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MA_775_DIABLO [31]
3 years ago
13

The scatter plot shows the relationship between the test scores of a group of students and the number of hours they spend on soc

ial media in a week:
Part A: What is the group of points labeled A called? What is the point labeled B called? Give a possible reason for the presence of point B. (3 points)
Part B: Describe the association between a student’s test scores and the number of hours spent on social media. (2 points)

Mathematics
1 answer:
Rasek [7]3 years ago
7 0
Hi there!

Part A: Those groups of points that are circled and labeled A are called a correlation. In this case, the group of points represent negative correlation. The point that is labelled B is called an outlier, because it falls outside of the range of the other points. Point B may have been present like that, because while a person may spend a lot of time on social media, they might have understood the information very fast, or maybe they studied a bit on a different occasion.

Part B: Going back to part A, the graph represents a negative correlation. In this case, the more time spent on social media, the lower the test scores.
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Answer:

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Z = \frac{X - \mu}{\sigma}

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\mu = 550, \sigma = 100

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