Use SPSS to generate a single-case design graph for the following data (the answers are presented at the end of the book). The baseline data were collected on days 1 to 7. The data for the baseline phase were:

day 1 = 17, day 2 = 15, day 3 = 19, day 4 = 21, day 5 = 19, day 6 = 18, day 7 = 18)

The intervention phase data were collected from days 8 to 14 and these data were:

day 8 = 13, day 9 = 16, day 10 = 13, day 11 = 12, day 12 = 13, day 13 = 13, day 14 = 12)