NBCE Research and Development 3

Question 1

Which sampling method ensures every member of a population has an equal chance of being selected?

Accepted Answer

Simple random sampling

Answer

Simple random sampling gives every individual in the population an equal and independent chance of inclusion.

Question 2

Institutional Review Board (IRB) approval is primarily required to:

Accepted Answer

Protect the rights and welfare of human research subjects

Answer

IRBs exist to safeguard the rights, privacy, and welfare of individuals participating in research.

Question 3

In a study with p = 0.03, the correct interpretation is:

Accepted Answer

If the null hypothesis were true, results this extreme would occur 3% of the time by chance

Answer

The p-value represents the probability of obtaining results as extreme as observed, assuming the null hypothesis is true.

Question 4

Construct validity in chiropractic outcomes research refers to:

Accepted Answer

Whether an instrument truly measures the theoretical construct it claims to measure

Answer

Construct validity assesses whether an instrument accurately captures the theoretical concept it is designed to measure.

Question 5

Which measure of central tendency is most resistant to extreme outlier values in a dataset?

Accepted Answer

Median

Answer

The median is not influenced by extreme values and is therefore more robust than the mean in skewed distributions.

(NBCE) National Board of Chiropractic Examiners Practice Test