A randomized controlled trial is run to evaluate the effectiveness of a new drug for asthma in children. A total of 250 children are randomized to either the new drug or placebo (125 per group). The mean age of children assigned to the new drug is 12.4 with a standard deviation of 3.6 years. The mean age of children assigned to the placebo is 13.0 with a standard deviation of 4.0 years. Is there a statistically significant difference in ages of children assigned to the treatments? Run the appropriate test at a 5% level of significance.

O a. Yes, reject the null hypothesis because there is a statistically significant difference in ages at a 5% level of significance. O b. No, do not reject the null hypothesis, because the difference is not significant at a 5% level of significance.