Exercise 6.93 introduces a study48 in which 2006 randomly selected US adults (age 18 or older) were asked to give the number of people in the last six months “with whom you discussed matters that are important to you." The average number of close confidants for the full sample was 2.2. In addition, the study asked participants whether or not they had a profile on a social networking site. For the 947 participants using a social networking site, the average number of close confidants was 2.5 with a standard deviation of 1.4, and for the other 1059 participants who do not use a social networking site, the average was 1.9 with a standard deviation of 1.3. Find and interpret a 90% confidence interval for the difference in means between the two groups.
Exercise 6.93 introduces a study48 in which 2006 randomly selected US adults (age 18 or older) were asked to give the number of people in the last six months “with whom you discussed matters that are important to you." The average number of close confidants for the full sample was 2.2. In addition, the study asked participants whether or not they had a profile on a social networking site. For the 947 participants using a social networking site, the average number of close confidants was 2.5 with a standard deviation of 1.4, and for the other 1059 participants who do not use a social networking site, the average was 1.9 with a standard deviation of 1.3. Find and interpret a 90% confidence interval for the difference in means between the two groups.
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
Concept explainers
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
Topic Video
Question
how do i answer this
Transcribed Image Text:S Close Confidants and Social Networking Sites
Exercise 6.93 introduces a study48 in which 2006 randomly selected US adults (age 18 or older) were asked to give the number of people in
the last six months "with whom you discussed matters that are important to you." The average number of close confidants for the full
sample was 2.2. In addition, the study asked participants whether or not they had a profile on a social networking site. For the 947
participants using a social networking site, the average number of close confidants was 2.5 with a standard deviation of 1.4, and for the
other 1059 participants who do not use a social networking site, the average was 1.9 with a standard deviation of 1.3. Find and interpret a
90% confidence interval for the difference in means between the two groups.
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 3 steps with 3 images
Knowledge Booster
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.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