4. Bags of potato chips have weights that follow a normal distribution where the mean is intended to be 200g. To test the process, 10 bags were weighed, which gave 2,191le = 2018 and 2,13:ng = 4072384. Find a 95% condence interval for the mean ,u. Does the process appear to be working properly? 5. In an opinion poll, 998 people were asked if they wanted to introduce the Euro as currency in Sweden and 479 answered yes. (a) Give a 95% condence interval for the proportion of the population that supports such a change. (b) Can we conclude that less than half the population wants to in troduce the Euro