A personnel director in a particular state claims that the mean annual income is greater in one of the? state's counties? (county A) than it is in another county? (county B). In County? A, a random sample of 13 residents has a mean annual income of $40,100 and a standard deviation of $8100. In County? B, a random sample of 11 residents has a mean annual income of $38,500 and a standard deviation of $5700. Ar ?= 0.025, answer parts? (a) through? (e). Assume the population variances are not equal. If convenient, use technology to solve the problem. a. Which is the correct claim below? A. "The mean annual income in county A is greater than in county B." B.
A personnel director in a particular state claims that the mean annual income is greater in one of the? state's counties? (county A) than it is in another county? (county B). In County? A, a random sample of 13 residents has a mean annual income of $40,100 and a standard deviation of $8100. In County? B, a random sample of 11 residents has a mean annual income of $38,500 and a standard deviation of $5700. Ar ?= 0.025, answer parts? (a) through? (e). Assume the population variances are not equal. If convenient, use technology to solve the problem. a. Which is the correct claim below? A. "The mean annual income in county A is greater than in county B." B.
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
100%
A personnel director in a particular state claims that the
answer parts? (a) through? (e). Assume the population variances are not equal. If convenient, use technology to solve the problem.
a. Which is the correct claim below?
A.
"The mean annual income in county A is greater than in county B."
B.
"The mean annual incomes in counties A and B are equal."
C.
"The mean annual income in county A is less than in county B."
D.
"The mean annual incomes in counties A and B are not equal"
B.
What are H0 and Ha?
The Null Hypoythesis, H0, is _____. The Alternative hypothese, Ha is ________
(b) Find the critical value(s) and identify the rejection region(s).
Enter the critical value(s) below.
Select the correct rejection region(s) below.
C.
Find the standardized test statistic.
t=
D. Decide whether to reject or fail to reject the null hypothesis.
E. Interpret the decision in the context of the original claim.
At the ____ significance level, there ______ enough evidence to support the personnel director's claim.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 6 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