A consumer watchdog organization estimates the mean weight of 1-ounce "Fun-Size" candy bars to see if customers are getting full value for their money. A random sample of 25 bars is selected and weighted, and the organization reports that a 95% confidence interval for the true mean weight of the candy bars is 0.981 to 0.989 ounces. a) What is the margin of error? b) How to interpret the confidence level of 95% in the context of the