If a student says that 38 is a persons observed score in a single testing, the true score is expected to fall within the interval from 38 2 (SEM) to 38 + 2 (SEM). Which of the following terms does this statement describe?
a. Confidence interval.
b. Standard error.
c. True score variance.
d. Random distribution.
Question 2
Based on the statistical properties of a normal distribution, 95 of all scores fall between
a. one standard deviation below the mean and one standard deviation above the mean.
b. two standard deviations below the mean and two standard deviations above the mean.
c. two standard deviations below the mean and one standard deviation above the mean.
d. three standard deviations below the mean and three standard deviations above the mean.
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