DSRT 734: Choosing a Test From the Blue Versus White Scatterplot — Item 15

DSRT 734 Question

Question 2
10 Points

Given the following scatterplot of the variables Blue versus White,
choose the most appropriate test to analyze the data.

Blue vs White Scatterplot

[SCATTERPLOT IMAGE]


Option A

Pearson's chi-square


Option B

Pearson's correlation


Option C

Independent samples t-test


Option D

Spearman's rho correlation

What this question assesses

This question assesses test selection from an unavailable scatterplot. Its answer choices have a distinct order, so it must be evaluated on its own rather than merged with similar-looking questions.

How to approach this type of question

Do not infer the picture from the variable names or from another Blue-versus-White item. With the original image, identify each variable’s measurement level and whether each plotted point is a paired observation. Examine linearity, monotonicity, outliers, ties, clusters, and possible ceiling or floor effects. Ask which candidate procedure is designed for a relationship between paired measurements, which assumes a linear form, which can summarize a monotonic rank relationship, and which instead expects a contingency table or independent groups. Check whether the visual evidence and study design support the same method. Preserve the answer-option order when recording the decision because this item orders the candidates differently from the other omitted-image items. In the absence of the scatterplot, the appropriate test cannot be determined and no option is selected here.

Keep this item’s Question 2 label, point value, and option order distinct. If the image becomes available, evaluate it with this question and note whether its axes or points differ from the other Blue-versus-White questions. A method-selection note should separately address scale, independence, form, and outliers before making a choice. Until then, neither similarity between items nor answer order provides evidence about the intended test. Record where the image came from before associating it with this item. Keep the original axes, legend, and cropping so the same visual evidence can be evaluated later.

Related DSRT 734 questions

• DSRT 734: Choosing a Test From the Blue Versus White Scatterplot — Item 14
• DSRT 734: Testing the Relationship Between Reading Time and GPA
• DSRT 734: Choosing a Test From the Blue Versus White Scatterplot — Item 23

Related DSRT 734 resources

• University of the Cumberlands course resources
• DSRT 734 Inferential Statistics in Decision-Making
• DSRT 734 Questions: Inferential Statistics in Decision-Making
• How to Choose an Inferential Statistical Test