In the past, thẻ mean age of students at a summer camp was 16.9 years old. A recent sample of 16 students from the camp found = 13.4, s 2.3. a. Build a 80% CI 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 CI command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. b. Use your Cl to decide whether the mean age of students at the camp has changed from 16.9 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 the mean has not changed since the old value of u is right in the middle of the new CI O No, O No, the mean has probably not changed since the new Cl contains the old value of u 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: we are using a Z-interval On< 30 we are using a T-interval we are using s in place of o

In the past, thẻ mean age of students at a summer camp was 16.9 years old. A recent sample of 16 students from the camp found = 13.4, s 2.3. a. Build a 80% CI 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 CI command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. b. Use your Cl to decide whether the mean age of students at the camp has changed from 16.9 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 the mean has not changed since the old value of u is right in the middle of the new CI O No, O No, the mean has probably not changed since the new Cl contains the old value of u 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: we are using a Z-interval On< 30 we are using a T-interval we are using s in place of o

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

In the past, the mean age of students at a summer camp was 16.9 years old. A recent sample of 16
students from the camp found x =
13.4, s = 2.3.
a. Build a 80% CI 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 16.9 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
No, the mean has not changed since the old value of u is right in the middle of the new
O No, the mean has probably not changed since the new Cl contains the old value of u
O Yes, the mean has probably changed since the new CI 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 Z-interval
On < 30
we are using a T-interval
O we are using s in place of o

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