A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10 cholesterol patients and tested them for their cholesterol level. The subjects were then placed on the new drug for a period of 6 months, and the cholesterol level reading was taken again. Both the results are given below. Assume the samples are random and dependent, and the populations are normally distributed. Use 0.01 level of significance and test whether there is evidence of reduced cholesterol level. Subject Before After A 196 181 B 224 219 с 201 209 D 196 176 E 176 170 F 259 229 G 265 255 H 193 190 I 240 240 J 268 250

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

a. Is the sampling dependent or independent in this study? Justify your answer. 
b. Use the critical value approach, test whether there is evidence of reduced cholesterol level. Include all key
steps of the test. 

A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10
cholesterol patients and tested them for their cholesterol level. The subjects were then placed on the new drug for
a period of 6 months, and the cholesterol level reading was taken again. Both the results are given below. Assume
the samples are random and dependent, and the populations are normally distributed. Use 0.01 level of
significance and test whether there is evidence of reduced cholesterol level.
Subject
Before
After
A
196
181
B
224
219
с
201
209
D
196
176
E
176
170
F
259
229
G
265
255
H
193
190
I
240
240
J
268
250
Transcribed Image Text:A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10 cholesterol patients and tested them for their cholesterol level. The subjects were then placed on the new drug for a period of 6 months, and the cholesterol level reading was taken again. Both the results are given below. Assume the samples are random and dependent, and the populations are normally distributed. Use 0.01 level of significance and test whether there is evidence of reduced cholesterol level. Subject Before After A 196 181 B 224 219 с 201 209 D 196 176 E 176 170 F 259 229 G 265 255 H 193 190 I 240 240 J 268 250
Expert Solution
steps

Step by step

Solved in 4 steps with 1 images

Blurred answer
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
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…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
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
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman