Question

Does catnip have a negative effect on cats’ social interactions with other cats? A student went to the local animal shelter and observed a dozen cats. She counted how many negative interactions each cat had in a 15-minute period. Then she exposed each cat to catnip and counted how many negative interactions the cat had in the following 15-minute period. Indicate whether the data were collected in a paired manner and therefore require a paired analysis.
Choose the answer from the menu in accordance to the question statement  

   A. Unpaired

B. Paired.

Answer 1

We can say data is paired if we have 2 of data sets for the same object.

Here for the same cat, we collected the negative interactions each cat had in a 15-minute period before & after the catnip.

So here we can say that the data are paired.

and we can find catnip have a negative effect on cats’ social interactions with other cats by taking a difference between them and using the paired t-test.

we can form a hypothesis like if mean after - before > 0 then it has a negative effect.

So here data is paired.

Answer:- Paired.