Homework Help is Here – Start Your Trial Now!
Math
Statistics
(a) What are the null hypothesis H, and the alternative hypothesis H, that the psychologist should use for the test? Ho: 0 H: 0 (b) What is the probability that the psychologist rejects the null hypothesis when, in fact, it is true? Round your response to two or more decimal places. D=0 OSO O

(a) What are the null hypothesis H, and the alternative hypothesis H, that the psychologist should use for the test? Ho: 0 H: 0 (b) What is the probability that the psychologist rejects the null hypothesis when, in fact, it is true? Round your response to two or more decimal places. D=0 OSO O

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
Question #10 please answer (c) and (d) :)
(a) What are the null hypothesis H, and the alternative hypothesis H, that the psychologist should use for the test? Ho: 0 H: 0 (b) What is the probability that the psychologist rejects the null hypothesis when, in fact, it is true? Round your response to two or more decimal places. D=0 OSO O<O (c) Assuming that the actual value of u is 80, what is the probability that the psychologist commits a Type II error? Round your response to two or more decimal places. (d) Suppose that the psychologist decides to perform another statistical test using the same population, the same null and alternative hypotheses, and the same level of significance, but for this second test the psychologist chooses a random sample of size 125 instead of a random sample of size 75. Assuming that the actual value of u is 80, how does the power of this second test compare to the power of the original test? OThe power of the second test is greater than the power of the original test OThe power of the second test is less than the power of the original test The powers of the two tests are equal
Transcribed Image Text:(a) What are the null hypothesis H, and the alternative hypothesis H, that the psychologist should use for the test? Ho: 0 H: 0 (b) What is the probability that the psychologist rejects the null hypothesis when, in fact, it is true? Round your response to two or more decimal places. D=0 OSO O<O (c) Assuming that the actual value of u is 80, what is the probability that the psychologist commits a Type II error? Round your response to two or more decimal places. (d) Suppose that the psychologist decides to perform another statistical test using the same population, the same null and alternative hypotheses, and the same level of significance, but for this second test the psychologist chooses a random sample of size 125 instead of a random sample of size 75. Assuming that the actual value of u is 80, how does the power of this second test compare to the power of the original test? OThe power of the second test is greater than the power of the original test OThe power of the second test is less than the power of the original test The powers of the two tests are equal
A psychologist is studying smokers' self-images, which she measures using the self-image (SI) score from a personality inventory. She would like to examine the mean SI score u for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 85 and that the standard deviation is 15, but the psychologist has good reason to believe that the value for the mean has decreased. She decides to perform a statistical test and chooses a random sample of 75 smokers' SI scores. She'll use the value 15 for the population standard deviation, and she'll test at the 0.01 level of significance. Based on this information, answer the questions below. Carry your intermediate computations to four or more decimal places, and round your responses as indicated. (If necessary, consult a list of formulas.) (a) What are the null hypothesis H, and the alternative hypothesis H, that the psychologist should use for the test? Ho: 0 H: 0
Transcribed Image Text:A psychologist is studying smokers' self-images, which she measures using the self-image (SI) score from a personality inventory. She would like to examine the mean SI score u for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 85 and that the standard deviation is 15, but the psychologist has good reason to believe that the value for the mean has decreased. She decides to perform a statistical test and chooses a random sample of 75 smokers' SI scores. She'll use the value 15 for the population standard deviation, and she'll test at the 0.01 level of significance. Based on this information, answer the questions below. Carry your intermediate computations to four or more decimal places, and round your responses as indicated. (If necessary, consult a list of formulas.) (a) What are the null hypothesis H, and the alternative hypothesis H, that the psychologist should use for the test? Ho: 0 H: 0
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
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
SEE MORE TEXTBOOKS