1. Which of the following statements is the most accurate description for the concept of standard deviation? - THE AVERAGE DISTANCE BETWEEN A SCORE AND THE MEAN 2. What measure of central tendency is calculated by adding all the values and dividing the sum by the number of values? - MEAN 3. A population has a μ=50 and σ=10. If these scores are transformed into zscores, the population of z-scores will have a mean and standard deviation of: - μ=0 and σ=1 4. ________ is data that has been organized into groups known as interval or classes. - GROUPED DATA 5. If mean=25, median=30 and standard deviation=15, the distribution will be” - NEGATIVELY SKEWED 6. Any measure indicating the center of a set of data, arranged in a n increasing or decreasing order of magnitude, is called a measure of: - CENTRAL TENDENCY 7. The values of the variate that divide a set of data into four equal parts after arranging the observation in ascending (least to greatest) order of magnitude are called: - QUARTILES 8. If the scores on a test have a mean of 26 and a standard deviation of 4, what is the z-score for a score of 18? -–2 9. Take the formula Z = (X – μ)/σ, where μ is the mean of the population, X is the value of the element, Z is the zscore and σ is the standard deviation. What does this formula calculate? *STANDARD SCORE 10. The average of squared deviations from mean is called: - VARIANCE