14. Table 8.29 refers to a national study of 15- and 16-year-old adolescents. The groups are four combinations of gender and race The event of interest is ever having sexual inter- course Is there an association between group and the response? Interpret the results in the computer printout supplied with the table. TABLE 8.28 Yes Injury No Seat Yes 2409 35,383 Belt No 3865 27.037 Source. Thanks to Dr Cristanna Cook. Medical Car Development. Augusta. Maine, for supplying these dald TABLE 8.29 Intercourse Group Yes No Black females 22 36 White females 26 149 Black males 29 23 White males 43 134 STATISTICS FOR TABLE OF GROUP BY INTERCOURSE Statistic DF Value Prob Chi-Square 3 39.830 0.001 Likelihood Ratio Chi-Square 3 37.517 0.001 Source. S P Morgan and J. D Teachman. Journal of Man riage and Family, Vol 50 (1988). 929-936.