1. A constant-cause system refers to a
    1. stable process
    2. an improper process
    3. process with no common cause variation
    4. a process with multiple assignable causes
  2. The median is an example of an extreme

    3. a. trimmed mean   b. standard deviation   c. mean   d. mean deviation  

  3. The mean is most useful when the data are
    1. from a small sample size
    2. approximately symmetric
    3. positively skewed
    4. negatively skewed
  4. Which of the following is a problem associated with using only the mean to represent central tendency?
    1. It has more variability associated with it than the median and mode.
    2. It is inappropriate when the distribution is normal.
    3. It is more influenced by extreme scores than the median and mode.
    4. It can only be used in inferential statistics.
  5. The focus of performance over time is the focus on the output of a

    6. a. rule book   b. meeting   c. agenda   d. process  

  6. The _____ is NOT an index of dispersion of a set of test scores.

    7. a. mean   b. range   c. standard deviation   d. variance  

  7. A percentile score of 65 on a test means that
    1. 65% of the group tested did better than the person
    2. 65% of the items were answered correctly
    3. the person did better than 65% of the group tested
    4. the person's performance equaled that of 65% of the group tested
  8. The square root of the average squared deviation score is the

    9. a. expected mean deviation   b. weighted mean   c. standard deviation   d. trimmed deviation  

  9. Which of the following sets of scores is a perfectly symmetrical and unimodal distribution?

    10. a. 1,1,2,2,3,4,4,5,5   b. 1,2,3,3,4,5   c. 1,6,7,8,8,8,8,9,10,11   d. 6,7,8,9,10  

  10. The sample size, n, is the
    1. number of computations required for analysis
    2. number of data values to analyze
    3. median divided by the variance
    4. maximum number of data values needed for stability