40 statistics questions
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Ch11Questions.pdf
Exercise 11: Interpreting Scatterplots
Questions to Be Graded
Name:
Class:
Date: 31-07-2020
1: Why might researchers choose to include a scatterplot in the publication of their study?
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2: Identify the x-variable and the y-variable presented in the Figure 2 of the Kriikku et al. (2014) study.
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3: What type of relationship (positive or negative) does Figure 2 illustrate? Provide a rationale for your answer.
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4: Describe the pattern of plotted points in Figure 2 (Kriikku et al., 2014). What is the strength of the relationship shown in this figure? Provide a rationale for your answer.
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5: What is an outlier? What are the ways in which an outlier might occur in a study?
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6: Are there any outliers in Figure 2 from the Kriikku et al. (2014) study? Provide a rationale for your answer.
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7: Do outliers increase or decrease the strength of the relationship between the variables breath-alcohol screening results (estimated blood-alcohol levels) and the venous blood-alcohol levels? Provide a rationale for your answer.
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8: Review Figure 2 from the Kriikku et al. (2014) study and identify how many points are on this scatterplot. What does each point represent?
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9: Did this study have an adequate sample size? Provide a rationale for your answer.
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10: Based on the results of Kriikku and colleagues (2014) study, what do you think is the most appropriate method for determining if an individual is driving while intoxicated or drunk? Provide a rationale for your answer.
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- s_name: Amanda
- sclass: Statistics
