10. A forensic psychologist is interested in assessing the prevalence of major depressive dis- orders (MDD) among a sample of prison inmates. A random sample of 13 inmates was selected and tested on the MDI (Major Depressive Inventory), a self-report instrument designed to measure levels of depression. Scores above 13 are said to indicate a major depressive disorder and possible suicide attempts (no belts or neckties allowed). The scores were as follows: 8, 10, 11, 7, 13, 4, 8,7,9,3, 15, 10, 10. Find the mean, median, mode, and standard deviation