C784 / C 784 Exam (Latest Update 2025 / 2026) Applied Healthcare Statistics | Questions and Answers | Grade A | 100% Correct - WGU

C784 / C 784 Exam (Latest Update
) 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

,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

, 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