If an individual's mean school after multiple test administrations is 84 and the SEM is 5, what can be said about the distribution of his observed scores?
a. 95% of the time his observed scores will fall between 89 and 79
b. 68% of the time his observed scores will fall between 89 and 79
c. 68% of the time his observed score will fall between 91 and 97
d. There is not enough information provided to make a determination
Answer: b. 68% of the time his observed scores will fall between 89 and 79
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