Question

1. Data were obtained through a study that examined the responses to ozone and sulfur dioxide among adolescents suffering from asthma. The following are measurements of forced expiratory volume (liters, L.) for ten subjects.

Data (L.):         3.50         2.60         2.75         2.82         4.05         2.25         2.68         3.00         4.02         2.85

1. Determine the mean and standard deviation for these data.     Mean: ________                    Std. Dev: ________

2. How many standard deviations away from the mean is the value of 4.02 liters? ____________

3. What value would separate the top 10% of expiratory volume values from the rest of the data? ___________

Answer 1