C784 / C 784 Exam (Latest Update 2025 / 2026) Applied Healthcare Statistics | Questions and Answers | Grade A | 100% Correct - WGU
Question:
What display and numerical measure do you use for categorical data to categorical data? (C-->C)
Answer:
Display: 2-way tables
Numerical measure: conditional percentages
Question:
What display and numerical measure do you use for comparing categorical data to quantitative data? (C-->Q)
Answer:
Display: side-by-side boxplots
Numerical measure: 5-numbber summary
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Question:
What display and numerical measure do you use for comparing quantitative data to quantitative data? (Q-->Q)
Answer:
Display: scatterplot
Numerical measure: correlation coefficient
Question:
What is a lurking variable?
Answer:
Not accounted for in the study but affects the value of the response variable
Question:
What is Simpson's paradox?
Answer:
happens when trials don't use the same sample sizes
- individual trial results will be different than total results
EX: if you have 2 trials; trial 1 individual results may show high success rate, and trial 2 individual results will be lower, BUT total results of trial 2 will be higher than trial 1's total results
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Question:
What does regression analysis do?
Answer:
used to describe a trend and make predictions based on KNOWN data (can't use for unknown data)
Question:
What types of data are categorical data?
Answer:
names, labels, categories,
- CANNOT be added, subtracted, or written in (increasing) order
Question:
What charts are used with categorical data?
Answer:
- Pie charts
- Bar charts
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