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(Solved) In a study of adolescent sexual behavior in Ontario, Canada, sexually active teens were asked to report their use of condoms and birth control.

Question: In a study of adolescent sexual behavior in Ontario, Canada, sexually active teens were asked to report their use of condoms and birth control. The following cross-tabulation of data is presented separately for boys and girls. Results are presented for three age groups.

Males (N = 2918)
Age of Teen
Frequency of Use 12-13 14-15 16-17 Total
of Protection
Always 145 401 532 1078
Intermittent 81 301 213 595
Never 355 557 333 1245
Total 581 1259 1078 2918
Females(N = 2824 )
Age of Teen
Frequency of Use 12-13 14-15 16-17 Total
of Protection
Always 75 586 726 1387
Intermittent 48 147 284 479
Never 264 446 248 958
Total 387 1179 1258 2824

Source: Adapted from B. Helen Thomas, Alba DiCenso, and Lauren Griffith, "Adolescent Sexual Behaviour: Results from an Ontario Sample: Part n. Adolescent Use of Protection," Canadian Journal of Public Health 89, no. 2 (1998): 94-97, Table 1, p. 95.' Used by permission.

Calculate the appropriate measure of association for these tables. Interpret the relationship between age and frequency of use of protection for the sample of sexually active Ontario teens. Is there a difference in the level of association for boys and girls?

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