When comparing two or more groups with regard to some observed ...

[cabate]

When comparing two or more groups with regard to some observed frequencies, the independent variable should be set in the
 
  a. rows
  b. columns
  c. marginal totals
  d. lower, right-hand corner

Question 2

In experimental research, cause-and-effect statements should not be made
  unless
 
  a. the sample groups are significantly different before the independent
   variable is introduced
   b. the sample groups are significantly different after the independent
   variable is introduced
   c. the sample groups represent a common population after the independent
   variable is introduced
   d. the null hypothesis is accepted

[kingfahad97]

Answer to Question 1

I appreciate you answering this question. Great community

Answer to Question 2

b

[cabate]

Thanks for the timely response, appreciate it

[chereeb]

Excellent