Researchers conducted a study to investigate whether there is a difference in mean PEAK EXPIRATORY FLOW in kids with asthma as compared to those without. Data on PEAK EXPIRATORY FLOW were collected...

Researchers conducted a study to investigate whether there is a difference in mean PEAK EXPIRATORY FLOW in kids with asthma as compared to those without. Data on PEAK EXPIRATORY FLOW were collected from 100 kids with asthma and 100 kids without chronic bronchitis. The mean PEAK EXPIRATORY FLOW for kids with asthma was 290 with a standard deviation of 64, while the mean PEAK EXPIRATORY FLOW for kids without asthma was 308 with a standard deviation of 77. Based on the data, is there statistical evidence of a lower mean PEAK EXPIRATORY FLOW in kids with asthma as compared to those without? Run the appropriate test at α=0.05. Equal variances. Appropriate Test? Decision Rule? Calculation of test statistic?