How many computers? In a simple random sample of  125  households, the sample mean number of personal computers was  2.90 . Assume the population standard deviation is  =σ0.88 . Part: 0 / 4 0 of 4 Parts Complete   Part 1 of 4     (a) Construct an  80 %  confidence interval for the mean number of personal computers. Round the answer to at least two decimal places.   An  80 %  confidence interval for the m

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

How many computers? In a simple random sample of 

125

 households, the sample mean number of personal computers was 

2.90

. Assume the population standard deviation is 

=σ0.88

.

Part: 0 / 4
0 of 4 Parts Complete
 
Part 1 of 4
 
 

(a) Construct an 

80
%

 confidence interval for the mean number of personal computers. Round the answer to at least two decimal places.

 

An 
80
%
 confidence interval for the m
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Follow-up Questions
Read through expert solutions to related follow-up questions below.
Follow-up Question

Reading proficiency: An educator wants to construct a 

98%

 confidence interval for the proportion of elementary school children in Colorado who are proficient in reading.

 

Part: 0 / 3
0 of 3 Parts Complete
 
Part 1 of 3
 
 

(a) The results of a recent statewide test suggested that the proportion is 

0.61

. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 

0.03

?

A sample of 
 
 elementary school children is needed to obtain a 
98%
 confidence interval with a margin of error of 
0.03
Solution
Bartleby Expert
SEE SOLUTION
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