Question

determine whether the following is an example of a sampling error or a non sampling error. a researcher studied brother - sister pairs to see if there is a difference in iq scores. although the researcher made no mistakes in collecting the data, the findings showed that there was a difference when in reality there is no difference in iq based on gender.
○ sampling error
○ non sampling error

Explanation:

Sampling error occurs due to the inherent variability when a sample (here, brother - sister pairs) doesn't perfectly represent the population. Non - sampling errors are due to mistakes in data collection, analysis, etc. Since the researcher made no data - collection mistakes, but the sample results differed from the population truth, this is sampling error.

Answer:

A. Sampling Error