Conduct a hypothesis testing using critical value method: The school nurse thinks the average height of 11th graders has increased. The average height of a 11th grader five years ago was 158 cm with a standard deviation of 20 cm. She takes a random sample of 200 students and finds that the average height of her sample is 160 cm with a standard deviation of 17cm. Using 95% confidence, are 11th graders now taller than those 11th graders before? Using the 7 steps: 1. Describe the population parameter of interest. 2. Formulate the null and alternative hypothesis. 3. Check the assumptions
Conduct a hypothesis testing using critical value method: The school nurse thinks the average height of 11th graders has increased. The average height of a 11th grader five years ago was 158 cm with a standard deviation of 20 cm. She takes a random sample of 200 students and finds that the average height of her sample is 160 cm with a standard deviation of 17cm. Using 95% confidence, are 11th graders now taller than those 11th graders before? Using the 7 steps: 1. Describe the population parameter of interest. 2. Formulate the null and alternative hypothesis. 3. Check the assumptions
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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Question
Conduct a hypothesis testing
using critical value method:
The school nurse thinks the
average height of 11th graders
has increased. The average height of a 11th grader five years ago was 158
cm with a standard deviation of 20 cm. She takes a random sample of 200 students and finds that the
average height of her sample is
160 cm with a standard deviation of 17cm. Using 95% confidence, are 11th graders now taller than those 11th graders before?
Using the 7 steps:
1. Describe the population
parameter of
interest.
2. Formulate the null and
alternative
hypothesis.
3. Check the assumptions.
4. Choose a significance level
size for α.
5. Select the appropriate test
statistic.
Compute the test statistic using
the
appropriate formula.
6. State the decision rule for
rejecting
or not the null hypothesis.
7. Compare the computed test
statistic and the critical value/s.
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