ported in June 2011. 23-35 36-49 50-65 65+ 312 253 195 59 ion that users are equally likely

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
4. Between 2008 and 2011, the age distribution of users of social networking sites such as Facebook changed
dramatically. In 2008, 70% of users were 35 years old or younger. In 2011, the age distribution was
much more spread out. The table below shows the age distribution of 975 users of social networking
sites from a survey reported in June 2011.
36-49
Age
Frequency
18-22
23-35
50-65
65+
156
312
253
195
59
(a) Test an assumption that users are equally likely to be in each of the five age groups listed. Use
95% confidence.
(b) Which age group contributes the largest amount to the sum for the x2 test statistic? For this age
group, is the observed count smaller or larger than the expected count?
Transcribed Image Text:4. Between 2008 and 2011, the age distribution of users of social networking sites such as Facebook changed dramatically. In 2008, 70% of users were 35 years old or younger. In 2011, the age distribution was much more spread out. The table below shows the age distribution of 975 users of social networking sites from a survey reported in June 2011. 36-49 Age Frequency 18-22 23-35 50-65 65+ 156 312 253 195 59 (a) Test an assumption that users are equally likely to be in each of the five age groups listed. Use 95% confidence. (b) Which age group contributes the largest amount to the sum for the x2 test statistic? For this age group, is the observed count smaller or larger than the expected count?
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Point Estimation, Limit Theorems, Approximations, and Bounds
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
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