Which of the following is the best example of variability due to measurement error? 1. Two people with the same level of depression produce different scores on a depression inventory. 2. People...

Description
Which of the following is the best example of variability due to measurement error?
1. Two people with the same level of depression produce different scores on a depression
inventory.
2. People getting Treatment A have lower depression scores than those getting Treatment B
because Treatment A is more effective at helping depressed people.
3. Some people are more resistant to treatment for depression than others.
Ans:
Measurement error is the difference between the True score and Observed score.
Observed score is sum total of True score, Random error and Systematic error.
Observed score = True score + Random error + Systematic error
Measurement errors may be due to the respondent, observer, and encoder or interviewer
recording data during collection. These are known as random errors. Systematic error is the
instrumentation error caused by problems in the measurement...