Listed below are weights (grams) from a simple random sample of pennies produced after 1983. construct a 95% confidence interval estimate of standard deviation for the population of such pennies. what does the confidence interval suggest about the U.S mint specifications that now require a standard deviation of 0.0230 g for weights of pennies? 

2.5024  2.5298  2.4998  2.4823  2.5163  2.5222  2.4900 2.4907  2.5017