A research institute examined the IQs (intelligence quotients) in American adults and reported a mean (u) of 100 points and a standard deviation (o) of 15 points. But I wonder if the statistics in my city, Chicago, would be different from the national average. Specifically, I have a hunch that individuals in Chicago might have higher IQs compared to the national average. To test this idea, I randomly picked 18 friends of mine living in Chicago and asked them their individual IQs. The data set is shown below. (The same data are also provided in an Excel file if you choose to use Excel for your calculations.) I would like to perform a Z test to see if the IQs in Chicago (represented by the sample of 18 individuals) are significantly higher than the national average IQ. The significance level for my Z test was set at a = 05. The hypotheses should be directional because I am predicting a specific direction of difference, and
A research institute examined the IQs (intelligence quotients) in American adults and reported a mean (u) of 100 points and a standard deviation (o) of 15 points. But I wonder if the statistics in my city, Chicago, would be different from the national average. Specifically, I have a hunch that individuals in Chicago might have higher IQs compared to the national average. To test this idea, I randomly picked 18 friends of mine living in Chicago and asked them their individual IQs. The data set is shown below. (The same data are also provided in an Excel file if you choose to use Excel for your calculations.) I would like to perform a Z test to see if the IQs in Chicago (represented by the sample of 18 individuals) are significantly higher than the national average IQ. The significance level for my Z test was set at a = 05. The hypotheses should be directional because I am predicting a specific direction of difference, and
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
What is the z statistic and critical z value(s)?
Transcribed Image Text:5
Paragraph
A research institute examined the IQs (intelligence quotients) in American adults and reported a mean
(u) of 100 points and a standard deviation (o) of 15 points. But I wonder if the statistics in my city,
Chicago, would be different from the national average. Specifically, I have a hunch that individuals in
Chicago might have higher IQs compared to the national average.
Styles
To test this idea, I randomly picked 18 friends of mine living in Chicago and asked them their individual
IQs. The data set is shown below. (The same data are also provided in an Excel file if you choose to use
Excel for your calculations.)
I would like to perform a Z test to see if the IQs in Chicago (represented by the sample of 18 individuals)
are significantly higher than the national average IQ. The significance level for my Z test was set at a =
05. The hypotheses should be directional because I am predicting a specific direction of difference, and
the test should be one-tailed.
Editing
Transcribed Image Text:igate
Subject
1
2
3
4
5
6
7
8
9
PSY230 Miller
Dill copere contient and matural scieną duszpanel
PER MANGE t the usbrucken vill se destaEURE COUPEZ
Seasonal must strani ter uploading to any course shell,
comply with applicable prefekk bra Coulty member
10
11
12
13
BHSK7%
14
15
16
17
IQ
90
18
108
96
98
94
128
92
100
114
122
134
94
112
109
87
115
92
118
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 2 steps with 1 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