Question: Facebook at Penn State. The graphic below displays Minitab output for how frequently students at the University Park and commonwealth campuses of Penn State who have Facebook accounts make use of their accounts. The output includes the two-way table of observed counts, the expected counts, and each cell’s contribution to the chi-square statistic.

a) Verify from the output that the data meet the cell count requirement for use of chi-square.

b) What hypotheses do chi-square test? What is the test statistic and it’s P-value?

c) Which cells contribute the most to X²? Compare the observed and expected counts in these cells and comment on the most important differences in Facebook use between students at the two locations.