The following data are the response times (in minutes) of six people measured after two treatments. The order in which each person received the treatments was determined by randomization. The investigator was interested to see if the two treatments are different.

	1	2	3	4	5	6
Treatment I	46	64	80	71	99	70
Treatment II	78	66	70	64	46	70

a. What is the name of this design? Explain.

b. What is the blocking factor used in this design?

c. Is there any evidence at the $5 %$ level that the two treatments are different?