WGU C784 - Applied Healthcare Statistics Objective Assessment #1, Questions and Answers

WGU C784 - Applied Healthcare Statistics
Objective Assessment #1, Questions and
Answers
WGU C784 - Applied Healthcare Statistics: Practice Questions & Answers

Module 1: Data and the Healthcare System

1. A researcher collects data on the blood types of 100 patients. What type of data is "blood
type"?
A. Numerical Continuous
B. Numerical Discrete
C. Categorical Nominal ✓
D. Categorical Ordinal

2. Which of the following is an example of discrete numerical data?
A. Weight of a newborn in kilograms
B. Temperature of a patient in Fahrenheit
C. Number of patients in an emergency room ✓
D. Pain level on a scale of 1-10

3. The level of measurement that has a true, meaningful zero point is:
A. Nominal
B. Ordinal
C. Interval
D. Ratio ✓

4. A study that observes subjects without influencing them is known as:
A. An experimental study
B. An observational study ✓
C. A controlled study
D. A randomized study

5. In an experiment, the group that does not receive the treatment is called the:
A. Treatment group
B. Control group ✓
C. Experimental group
D. Placebo group

,6. Which of the following is a key principle of ethical research involving human subjects?
A. Informed Consent ✓
B. Mandatory Participation
C. Data Secrecy
D. Result Guarantee

7. "The patient's temperature is 98.6°F." This is an example of what level of measurement?
A. Nominal
B. Ordinal
C. Interval ✓
D. Ratio

8. What type of data is a "patient satisfaction score" of Very Satisfied, Satisfied, Neutral,
Dissatisfied?
A. Numerical Continuous
B. Numerical Discrete
C. Categorical Nominal
D. Categorical Ordinal ✓

9. The entire group of individuals we want to draw conclusions about is the:
A. Sample
B. Population ✓
C. Parameter
D. Statistic

10. A numerical summary of a sample is called a:
A. Parameter
B. Statistic ✓
C. Population
D. Variable



Module 2: Displaying and Describing Univariate Data

11. Which of the following is best for displaying the distribution of a categorical variable?
A. Histogram
B. Box Plot
C. Bar Chart ✓
D. Scatterplot

,12. The best graphical display for visualizing the shape, center, and spread of a continuous
numerical variable is a:
A. Pie Chart
B. Bar Chart
C. Histogram ✓
D. Line Graph

13. In a symmetric distribution, the mean, median, and mode are:
A. All equal ✓
B. All different
C. Only the mean and median are equal
D. Impossible to determine

14. Which measure of central tendency is most affected by outliers?
A. Mean ✓
B. Median
C. Mode
D. Range

15. The middle value of a sorted dataset is the:
A. Mean
B. Median ✓
C. Mode
D. Midrange

16. What is the range of the following data set: 5, 10, 12, 4, 6, 18?
A. 4
B. 14 ✓
C. 18
D. 22

17. The standard deviation is a measure of:
A. Central Tendency
B. Position
C. Spread/Variability ✓
D. Skewness

18. If a distribution is skewed to the right (positively skewed), what is the typical relationship
between the measures of center?
A. Mean < Median < Mode

, B. Mode < Median < Mean ✓
C. Mean = Median = Mode
D. Median < Mode < Mean

19. The five-number summary consists of:
A. Mean, Median, Mode, Range, SD
B. Min, Q1, Median, Q3, Max ✓
C. Min, Mean, Median, Mode, Max
D. Q1, Q2, Q3, Q4, Mean

20. Which graph is used to display the five-number summary?
A. Histogram
B. Pie Chart
C. Bar Chart
D. Box Plot (Box-and-Whisker Plot) ✓

21. A data value that is significantly higher or lower than the rest of the data is called a(n):
A. Average
B. Outlier ✓
C. Median
D. Deviation

22. What is the mode of the following data: 2, 3, 5, 5, 6, 7, 7, 7, 8?
A. 5
B. 6
C. 7 ✓
D. There is no mode

23. What is the median of the following data: 10, 20, 30, 40, 50?
A. 20
B. 30 ✓
C. 40
D. 35

24. If the standard deviation of a dataset is zero, what does this imply?
A. The mean is zero.
B. All values are the same. ✓
C. There is a calculation error.
D. The data is normally distributed.