A large private university and a large public university selected random sample of incoming freshman and determined the proportion that were in the top 10% of their graduating class. Let p1 be the proportion of all entering freshmen at the private university who graduated in the top 10% of their high school class and let p2 be the proportion of all entering freshmen at the public university who graduated in the top 10% of their high school class. A 95% confidence interval for p1 - p2 is (0.088, 0.126).

(a) What is the point estimate that was used to create the interval? What is the margin of error?
b) Interpret the confidence level.

(co 3) the soup produced by a company has a salt level that is normally distributed with a mean of 5.4 grams and a standard deviation of 0.3 grams. the company takes readings of every 10th bar off the production line. the reading points are 5.8, 5.9, 4.9, 6.5, 5.0, 4.9, 6.2, 5.1, 5.7, 6.1. is the process in control or out of control and why? it is out of control as two of these data points are more than 2 standard deviations from the mean it is in control as the data points more than 2 standard deviations from the mean are far apart it is out of control as one of these data points is more than 3 standard deviations from the mean it is in control as the values jump above and below the mean