Question 22 In the past, the mean age of students at a summer camp was 16.7 years old. A recent sample of 16 students from the camp found a 12, s = 2.1. %3D a. Build a 90% Cl for the current mean age of students at the camp. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. b. Use your CI to decide whether the mean age of students at the camp has changed from 16.7 years old. O Yes, the mean has probably changed since the old value of u is not right in the middle of the new CI O No, the mean has not changed since the old value of µ is right in the middle of the new CI or O No, the mean has probably not changed since the new CI contains the old value of µ O Yes, the mean has probably changed since the new Cl does not contain the old value of u c. For this problem, it is important that we know that ages are normally distributed. This is because: O we are using a T-interval On< 30 we are using s in place of o we are using a Z-interval

Question 22 In the past, the mean age of students at a summer camp was 16.7 years old. A recent sample of 16 students from the camp found a 12, s = 2.1. %3D a. Build a 90% Cl for the current mean age of students at the camp. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. b. Use your CI to decide whether the mean age of students at the camp has changed from 16.7 years old. O Yes, the mean has probably changed since the old value of u is not right in the middle of the new CI O No, the mean has not changed since the old value of µ is right in the middle of the new CI or O No, the mean has probably not changed since the new CI contains the old value of µ O Yes, the mean has probably changed since the new Cl does not contain the old value of u c. For this problem, it is important that we know that ages are normally distributed. This is because: O we are using a T-interval On< 30 we are using s in place of o we are using a Z-interval

Name: • Question 22In the past, the mean age of students at a summer camp w
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Description: • Question 22In the past, the mean age of students at a summer camp was 16.7 years old. A recent sample of 16students from the camp found = 12, s = 2.1.a. Build a 90% Cl for the current mean age of students at the camp.Round all intermediate calcula