A study of Kickstarter projects showed that 54.2% were successful, that is, achieved its goal and raised at least the targeted goal amount. In an effort to identify network dynamics that influence success, projects were subdivided into projects of owners who had backed other projects before, during or after creating their project (owners with backing history) and projects of owners without backing history. The results are as follows:

PROJECT OWNER’S BACKING HISTORY

Project outcome	Backing History	No Backing History	Total
Successful	17,667	19,202	36,869
Not Successful	10,921	20,267	31,188
Total	28,588	39,469	68,057

a. Construct contingency tables based on total percentages, row percentages, and column percentages.

b. Which type of percentage—row, column, or total—do you think is most informative for these data? Explain.

c. What conclusions concerning the pattern of successful Kick-starter projects can you reach?