Question

14. For a negatively skewed distribution with a mode of X-25 and a median of 20, the mean is probably a greater than 25 b. less than 20 c. between 20 and 25 d. cannot be determined from the information given 15. A distribution is positively skewed. Which of the most probable order for the three measures of central tendency? a mean - 40, median - 50, mode - 60 b. mean-60, median - 50, mode - 40 c. mean - 40, median-60, mode - 50 d. mean - 50, median - 50, mode - 50 16. A sample of 8 scores has a mean of M-12. What is the value of XX for this sample? a. 20 b. 32 c. 48 d. 96 17. A sample of n - 7 scores has a mean of M-16. One score in the sample is changed from X-6 to X-20. What is the value for the new sample mean? a. 18 b. 15 c. 16.5 d. 20 18. Standard deviation is probably the most commonly used value to describe and measure variability. Which of the following accurately describes the concept of standard deviation? a. The average distance between one score and another b. The average distance between a score and the mean c. The total distance from the smallest score to the lowest score d. One half of the total distance from the smallest score to the largest score Page 3 of 4

Answer 1

14) Megatively skewed distribution statshed the Condition is mean <median amode Hare mode =a6 median=20 Then mean is probably less than 20 option (6) - 156) Positively Sleewed distribution relation befuwen of central tendency is mode <median <mean ophon bas Grrect meen=60, median = to, mode = 40 16) n=8 moun M = 12 : mean .M= Exi - Exia nom 8*12 option el = 96 17) n = 7 moun M=16 Zx;'Man = 7x16 = 112 X= 6 to X=20 change, are add only 14 in the value of exi Then the Exi = 112 + 14 (14=120-6)) = 126 mean M = 126 = 18 opfron a 18) option b us correct The average dostance between a score and the mean