If the alpha level is changed from p < .05 two-tailed, to p < .01 two-tailed, a. What happens to the boundaries for the critical region? [Select] b. What happens to the probability of a Type I error? [Select] A new antacid medicine is tested on n = 400 people, and researchers find its effect on upset stomach duration is not significant, as it reduces indigestion on average for just M = 0.2 hours (from 4 hours to 3.8 hours), standard deviation s = 1.2 hours. c. The researchers try to improve the medicine and test it on a new sample of n = 400 people. While they find that on average it still reduces indigestion for just M = 0.2 hours, it works more consistently across people, as shown by the standard deviation in the new sample being lower, s = 0.8 hours. What happens to the statistical power for determining if the improved medicine is significantly reducing headache duration, and why? [Select] d. The FDA tells the researchers they will approve of this new medicine after they run one more study with a larger sample, of n = 1,000 people. What happens to the Cohen's d effect size of this medicine when the sample size is increased to 1,000? [Select]
If the alpha level is changed from p < .05 two-tailed, to p < .01 two-tailed, a. What happens to the boundaries for the critical region? [Select] b. What happens to the probability of a Type I error? [Select] A new antacid medicine is tested on n = 400 people, and researchers find its effect on upset stomach duration is not significant, as it reduces indigestion on average for just M = 0.2 hours (from 4 hours to 3.8 hours), standard deviation s = 1.2 hours. c. The researchers try to improve the medicine and test it on a new sample of n = 400 people. While they find that on average it still reduces indigestion for just M = 0.2 hours, it works more consistently across people, as shown by the standard deviation in the new sample being lower, s = 0.8 hours. What happens to the statistical power for determining if the improved medicine is significantly reducing headache duration, and why? [Select] d. The FDA tells the researchers they will approve of this new medicine after they run one more study with a larger sample, of n = 1,000 people. What happens to the Cohen's d effect size of this medicine when the sample size is increased to 1,000? [Select]
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
![If the alpha level is changed from p < .05 two-tailed, to p < .01 two-tailed,
a. What happens to the boundaries for the critical region? [Select]
b. What happens to the probability of a Type I error? [Select]
A new antacid medicine is tested on n = 400 people, and researchers find its effect on upset
stomach duration is not significant, as it reduces indigestion on average for just M = 0.2 hours (from
4 hours to 3.8 hours), standard deviation s = 1.2 hours.
c. The researchers try to improve the medicine and test it on a new sample of n = 400 people. While
they find that on average it still reduces indigestion for just M = 0.2 hours, it works more
consistently across people, as shown by the standard deviation in the new sample being lower, s =
0.8 hours. What happens to the statistical power for determining if the improved medicine
is significantly reducing headache duration, and why? [Select ]
d. The FDA tells the researchers they will approve of this new medicine after they run one more
study with a larger sample, of n = 1,000 people. What happens to the Cohen's d effect size of this
medicine when the sample size is increased to 1,000? [Select]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa2a79f3c-9d5f-475d-8512-37c872933c1c%2Fd18a4bb1-93f2-4a17-93b7-592b171c0ff0%2F6ps9877_processed.png&w=3840&q=75)
Transcribed Image Text:If the alpha level is changed from p < .05 two-tailed, to p < .01 two-tailed,
a. What happens to the boundaries for the critical region? [Select]
b. What happens to the probability of a Type I error? [Select]
A new antacid medicine is tested on n = 400 people, and researchers find its effect on upset
stomach duration is not significant, as it reduces indigestion on average for just M = 0.2 hours (from
4 hours to 3.8 hours), standard deviation s = 1.2 hours.
c. The researchers try to improve the medicine and test it on a new sample of n = 400 people. While
they find that on average it still reduces indigestion for just M = 0.2 hours, it works more
consistently across people, as shown by the standard deviation in the new sample being lower, s =
0.8 hours. What happens to the statistical power for determining if the improved medicine
is significantly reducing headache duration, and why? [Select ]
d. The FDA tells the researchers they will approve of this new medicine after they run one more
study with a larger sample, of n = 1,000 people. What happens to the Cohen's d effect size of this
medicine when the sample size is increased to 1,000? [Select]
Expert Solution
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 2 steps with 2 images
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
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
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
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
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
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
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman