The spatial orientation skills of 30 male and 30 female students were challenged in a wooded park near the Boston College campus ...

     The   spatial orientation skills of 30 male and 30 female students were challenged   in a wooded park near the Boston College campus in Newton, Massachusetts. The   participants were asked to rate their own sense of direction as either good   or poor. In the park, students were instructed to point to predesignated   landmarks and also to the direction of south. For the female students who had   rated their sense of direction to be good, the table on page 341, (see the   attached excel file) provides the pointing errors (in degrees) when they   attempted to point south.   a. If, on average, women who   consider themselves to have a good sense of direction do no better than they   would by just randomly guessing at the direction of south, what would their   mean pointing error be?   b. At the 1% significance   level, do the data provide sufficient evidence to conclude that women who   consider themselves to have a good sense of direction really do better, on   average, than they would by just randomly guessing at the direction of south?   Use a one-mean t-test.   c. Obtain a normal probability   plot, boxplot, and stem- and-leaf diagram of the data. Based on these plots,   is use of the t-test reasonable? Explain your answer.   d. Use the technology of your   choice to perform the data analyses in parts (b) and (c).   Female Student Point Error (in   °)   1 14   2 122   3 128   4 109   5 12   6 91   7 8   8 78   9 31   10 36   11 27   12 68   13 20   14 69   15 18