An examination that is so difficult that many people get low ...

[nautica902]

An examination that is so difficult that many people get low scores and only a few get
  high scores would create a _____ .
 
  a. negatively skewed distribution
  b. bimodal frequency polygon
  c. rectangular distribution
   d. positively skewed distribution

Question 2

When scores represent ratio level of the measurement, the _____ is the preferred measure of
  central tendency and the _____ the preferred measure of variability.
 
  a. mean; range
   b. mean; standard deviation
  c. median; mean
  d. median; standard deviation

[okolip]

Answer to Question 1

D

Answer to Question 2

B