2) A large University study found that many high school students hold a part time job. The researchers surveyed a random sample of 5500 high school students nationwide; 68% of them said they had worked part time at some point in high school. a) Create a 90% confidence interval for the proportion of high school students who have held a part time job. Use your calculator to create this interval. Do not do the calculations by hand [1 point). b) Interpret your interval from part a [1 point}.