prev next front |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |11 |12 |13 |14 |15 |16 |17 |18 |19 |20 |21 |review
Helmet use was next analyzed by the two principal covariates, gender and race. In other studies girls were found to be twice as likely to wear helmets as boys.

Here we see that, even though boys rode bicycles twice more frequently than girls, about 80% of both genders wore bicycle helmets.

The very large sample size have made these values statistically, but not practically, significant.