When some variable is "normally distributed," it means that A. measurements are made on a large number of normal individuals. B. measurements are made on a group of average individuals. C. measurements are made on a random sample of a large number of individuals. D. the distribution closely approximates the mathematical model of a normal curve. Which statement about variability is most accurate? A. On a given test everyone has a different score. B. The mean, median, and mode are rarely identical. C. Scores fluctuate about a measure of central tendency D. There are usually more high scores than low scores. The probability of making a Type I error A. depends upon the data. B. is under the direct control of the researcher C. is less than .05. D. is determined by chance.|