The whole point of using one of the various experimental designs ...

[faduma]

The whole point of using one of the various experimental designs is to
 
  a. create equivalent groups of subjects
  b. randomize the alpha error
  c. prevent any sampling error
  d. prevent any possibility of alpha error

Question 2

Sx is the symbol for
 
  a. sample standard deviation.
  b. sample variance.
  c. estimated population standard deviation.
  d. estimated population variance.

[aadams68]

Answer to Question 1

a

Answer to Question 2

c

[faduma]

Wow, this really help

[vickybb89]

Thanks for the timely response, appreciate it