A program at SF State is concerned about their graduation rates. Every year they enroll 400 junior-level students, and theyve been tracking the percent who manage to finish (graduate from) the program in a timely manner. Below are the data for the past 8 years. Express all calculations to 3 significant figures: ie. 12.3% or 0.123 (also 3-decimal spaces).

year	2000	2001	2002	2003	2004	2005	2006	2007
ontime grads	230	215	250	225	245	220	235	205

• Calculate the proportion of the class that graduates each year.
• What kind of control chart should be used in this situation? pChart Justify Why.
• Compute the 3 sigma control limits

Are we in control, give the control