An article states that a sample of 40 participants took 12 ± 2.3 (M ± SEM)seconds to complete a cognitive assessment.Which value is the standard error of the mean?
A) 40
B) 12
C) 2.3
D) the standard error of the mean is not reported in the article

Question

Quizplus · Accepted Answer

The value reported as "SEM" in the statement is 2.3, which stands for the standard error of the mean. The SEM is a measure of how much the sample mean deviates from the true population mean, and it is typically smaller than the sample standard deviation when the sample size is large enough. Therefore, the correct answer is C.

An Article States That a Sample of 40 Participants Took