A cell phone company collected data of texting speed in words per minute according to time in minutes. Explain why a scatterplot is used to represent the data, including the purpose of scatterplots.
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Texting speed according to time is two-variable data that is represented in a scatterplot because the scatterplot graphs the data as points to help visualize a relationship.
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A scatter plot is used to collect the data of texting speeds in words per minute in relation to the time as it is an ideal graph to measure the relationship between the two variables
- A scatter plot is useful in this case as both the variables, the time in minutes and the texting speed, are both closely related
- It is often used to collect data and study the presence or absence of a correlation between two variables
- The correlation can either be positive or negative. A positive correlation indicates that one variable leads to an increase in the quantity of the other while a negative correlation shows an inversely related set of variables. This means that an increase in one leads to a decrease in the other
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