1) In a random sample of 40 visitors to a certain theme park, it was determined that the mean amount of money spent per person at the park (including ticket price) was $114.27 per day. Assuming the population standard deviation of the amount spent per person is $15. Construct and Interpret a 90% confidence interval for the mean amount spent daily per person at the theme park. Pt estimate: _____________ Margin of Error: _________________ Confidence Interval (with units): Interpretation:

2) Thirty-five rounds of a new type of ammunition were fired from a test weapon, and the muzzle velocity of the projectile was measured. The sample had a mean muzzle velocity of 952 meters per second, with a standard deviation of 4.7 meters per second. Construct a 99% confidence interval for the mean muzzle velocity. Pt estimate: _________________ Margin of Error :_________________ Confidence Interval (with units):

3) In a Gallup poll, 500 out of 1020 randomly selected adults approved of how the president is conducting the job. Often this is referred to as the president's approval rating a) Construct a 95% confidence interval for the proportion of adults who approve of the job the president is doing. Pt estimate: _________________ Margin of Error: _________________ Confidence Interval:

b) Based on your answer in part (a), is it feasible to say that half of all adults approve of the job the president is doing? Explain