A researcher is testing the effects of plant food on plant growth. Nine plants have been given the plant food and another nine plants have not been given the plant food. After the period of eight weeks, the sample mean height of plants that given the plant food and not given the plant food is 16 and 14 inches respectively. Based on the past research result, the standard deviation of the height of plants that given the plant food and not given the plant food is known to be 2.5 and 1.5 inches respectively. The researcher thinks the food makes the plants grow taller. (a) Test the researcher's claim at 4% level of significance. (b) Find the p-value for the test in (a). (c) What is the assumption needed for the test in (a)?
A researcher is testing the effects of plant food on plant growth. Nine plants have been given the plant food and another nine plants have not been given the plant food. After the period of eight weeks, the sample mean height of plants that given the plant food and not given the plant food is 16 and 14 inches respectively. Based on the past research result, the standard deviation of the height of plants that given the plant food and not given the plant food is known to be 2.5 and 1.5 inches respectively. The researcher thinks the food makes the plants grow taller. (a) Test the researcher's claim at 4% level of significance. (b) Find the p-value for the test in (a). (c) What is the assumption needed for the test in (a)?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
(a) Test the researcher’s claim at 4% level of significance.
(b) Find the p-value for the test in (a).
(c) What is the assumption needed for the test in (a)?
![A researcher is testing the effects of plant food on plant growth. Nine plants have been
given the plant food and another nine plants have not been given the plant food. After
the period of eight weeks, the sample mean height of plants that given the plant food
and not given the plant food is 16 and 14 inches respectively. Based on the past research
result, the standard deviation of the height of plants that given the plant food and not
given the plant food is known to be 2.5 and 1.5 inches respectively. The researcher
thinks the food makes the plants grow taller.
(a) Test the researcher's claim at 4% level of significance.
(b) Find the p-value for the test in (a).
(c) What is the assumption needed for the test in (a)?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6be5f8c7-22dd-488e-9e48-9eb50aad2ffa%2F6f950fe2-60fd-4a53-9410-edb21ae7b0f4%2Fx05lsnj_processed.png&w=3840&q=75)
Transcribed Image Text:A researcher is testing the effects of plant food on plant growth. Nine plants have been
given the plant food and another nine plants have not been given the plant food. After
the period of eight weeks, the sample mean height of plants that given the plant food
and not given the plant food is 16 and 14 inches respectively. Based on the past research
result, the standard deviation of the height of plants that given the plant food and not
given the plant food is known to be 2.5 and 1.5 inches respectively. The researcher
thinks the food makes the plants grow taller.
(a) Test the researcher's claim at 4% level of significance.
(b) Find the p-value for the test in (a).
(c) What is the assumption needed for the test in (a)?
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 6 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Recommended textbooks for you
![MATLAB: An Introduction with Applications](https://www.bartleby.com/isbn_cover_images/9781119256830/9781119256830_smallCoverImage.gif)
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
![Probability and Statistics for Engineering and th…](https://www.bartleby.com/isbn_cover_images/9781305251809/9781305251809_smallCoverImage.gif)
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
![Statistics for The Behavioral Sciences (MindTap C…](https://www.bartleby.com/isbn_cover_images/9781305504912/9781305504912_smallCoverImage.gif)
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
![MATLAB: An Introduction with Applications](https://www.bartleby.com/isbn_cover_images/9781119256830/9781119256830_smallCoverImage.gif)
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
![Probability and Statistics for Engineering and th…](https://www.bartleby.com/isbn_cover_images/9781305251809/9781305251809_smallCoverImage.gif)
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
![Statistics for The Behavioral Sciences (MindTap C…](https://www.bartleby.com/isbn_cover_images/9781305504912/9781305504912_smallCoverImage.gif)
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
![Elementary Statistics: Picturing the World (7th E…](https://www.bartleby.com/isbn_cover_images/9780134683416/9780134683416_smallCoverImage.gif)
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
![The Basic Practice of Statistics](https://www.bartleby.com/isbn_cover_images/9781319042578/9781319042578_smallCoverImage.gif)
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
![Introduction to the Practice of Statistics](https://www.bartleby.com/isbn_cover_images/9781319013387/9781319013387_smallCoverImage.gif)
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman