CHDA EXAM QUESTIONS WITH 100%
CORRECT ANSWERS
2026
A random selection of claims within three DRGs represents
what type of sample?
Stratified sample
Simple random sample
Systematic sample
Cluster sample - Correct Answer-Stratified sample
What information should be included in a sampling plan?
Universe or population
Random seed
Inclusion and exclusion criteria
All of the above - Correct Answer-All of the above
Which of the following scenarios represents a non probability
sample?
A sample of 10 selected via random number assignment
,A sample of all of the records coded on a randomly selected
date
A sample of the first 10 students entering a classroom
A sample of the first 10 subjects on a list sorted by the last
two digits of their social security number - Correct Answer-A
sample of the first 10 students entering a classroom
An analyst is asked to select a random sample from the
population of patients that visited a clinic during the last
month. The sampling frame is presented to the analyst as a
hard copy list. What sampling technique is more appropriate
in this situation?
Simple random sample
Systematic sample
Cluster sample
Stratified sample - Correct Answer-Systematic sample
A listing of all subjects eligible to be sampled is called:
Sampling frame
Sample
Strata
, Random number - Correct Answer-Sampling frame
Why is setting and recording the random seed important in
random number generation?
All random number generation programs require a seed
The random numbers will be reproducible
The sample is not random unless the seed is set
The random seed is not important in sampling - Correct
Answer-The random numbers will be reproducible
What impact does increasing the sample size have on
precision?
Larger sample size results in a less precise estimate
Large sample sizes result in a more precise estimate
Sample size does not impact precision - Correct Answer-Large
sample sizes result in a more precise estimate
RAT-STATS is:
A sampling software tool distributed by the OIG
CORRECT ANSWERS
2026
A random selection of claims within three DRGs represents
what type of sample?
Stratified sample
Simple random sample
Systematic sample
Cluster sample - Correct Answer-Stratified sample
What information should be included in a sampling plan?
Universe or population
Random seed
Inclusion and exclusion criteria
All of the above - Correct Answer-All of the above
Which of the following scenarios represents a non probability
sample?
A sample of 10 selected via random number assignment
,A sample of all of the records coded on a randomly selected
date
A sample of the first 10 students entering a classroom
A sample of the first 10 subjects on a list sorted by the last
two digits of their social security number - Correct Answer-A
sample of the first 10 students entering a classroom
An analyst is asked to select a random sample from the
population of patients that visited a clinic during the last
month. The sampling frame is presented to the analyst as a
hard copy list. What sampling technique is more appropriate
in this situation?
Simple random sample
Systematic sample
Cluster sample
Stratified sample - Correct Answer-Systematic sample
A listing of all subjects eligible to be sampled is called:
Sampling frame
Sample
Strata
, Random number - Correct Answer-Sampling frame
Why is setting and recording the random seed important in
random number generation?
All random number generation programs require a seed
The random numbers will be reproducible
The sample is not random unless the seed is set
The random seed is not important in sampling - Correct
Answer-The random numbers will be reproducible
What impact does increasing the sample size have on
precision?
Larger sample size results in a less precise estimate
Large sample sizes result in a more precise estimate
Sample size does not impact precision - Correct Answer-Large
sample sizes result in a more precise estimate
RAT-STATS is:
A sampling software tool distributed by the OIG
