Which of the following are reasons that the standard deviation ...

[erika]

Which of the following are reasons that the standard deviation valuable in interpreting test scores?
 
  1 . It is easy to calculate.
  2 . It indicates the difference between the highest and lowest scores in a distribution.
  3 . It indicates how spread out the scores are around the mean.
  4 . It is not overly affected by extreme scores.
 
  a. 1, 2 b. 1, 3 c. 1, 4 d. 2, 3 e. 3, 4

Question 2

Look at Sandra's first three rules. Write one specific criticism of these rules based on the suggestions for preparing effective rules discussed in the chapter.
 
  What will be an ideal response?

[jennafosdick]

Answer to Question 1

d

Answer to Question 2

The rules are stated negatively. Stating rules positively is preferable.

[erika]

Thanks for the timely response, appreciate it

[xiazhe]

Gracias!