Which of the following is a clear example of an interaction? ...

[Collmarie]

Which of the following is a clear example of an interaction?
 
  a. rats given a drug in the morning are more active than rats given placebo and rats given placebo in the evening are more active than rats given drug.
  b. larger print is read faster in bright light than smaller print and smaller print is read slower in dim light than larger print.
  c. compared to drinking non-alcoholic beverages, drinking alcohol makes men more aggressive in a hot room and drinking alcohol also makes men more aggressive in a cool room.
  d. performance on a proofreading task is impaired when others are present rather than alone. The effect is the same whether the others are men or women.

Question 2

Sally selects classrooms of first graders to study the effects of teaching styles on math
   achievement. This is an example of ___________________ _____.
 
  a) stratified random sampling
  b) cluster sampling
  c) proportional sampling
  d) sampling error

[moormoney]

Answer to Question 1

A

Answer to Question 2

b

[Collmarie]

Thank you

[moormoney]

Happy to help you