Rounding to the nearest hundredth place

2. In the 2008 General Social Survey, a random group of people were asked whether they thought the sun went around the earth or vice versa. Of 1381 people surveyed, 310 thought the sun went around the earth. Find a 9% confidence interval for the population proportion of people who think the sun revolves around the earth. Show all work and interpret your results. (6pts) 3. Do we use the t-distribution when constructing a confidence interval for u if o is known or if o is unknown (1pt) 4. A random sample of 35 Hollywood movies made in the last 10 years had a mean length of 125.2 minutes, with a standard deviation of 20.4 minutes. Construct a 90% confidence interval for the true mean length of Hollywood movies made in the last 10 years. Show all work and interpret your results. (6pts)