An article in Fire Technology (LR DiMaio, PJ Chiesa, MS Ott - Fire technology, 1975 - Springer, p. 164-174) investigated two different foam expanding agents that can be used in the nozzles of fire-fighting spray equipment. A random sample of five observations with an aqueous film-forming foam (AFFF) had a sample mean of 4.5 and a standard deviation of 0.59. A random sample of five observations with alcohol-type concentrates (ATC) had a sample mean of 6.7 and a standard deviation 0.85. Construct the following: (a) A 90% two-sided confidence interval on of lo. 0.0754 3.078 Round your answer to three decimal places (e.g. 98.765). (b) A 95% two-sided confidence interval on o? / o. Comment on the comparison of the width of this interval with the width of the interval in part (a). 0.050 i 4.628 Round your answer to three decimal places (e.g. 98.765). The 95% confidence interval is wider than the 90% confidence interval. (c) A 90% lower-confidence bound on o lo,. i 0.075 Round your answer to three decimal places (e.g. 98.765). VI VI

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
Topic Video
Question
An article in Fire Technology (LR DiMaio, PJ Chiesa, MS Ott - Fire technology, 1975 - Springer, p. 164-174) investigated two different
foam expanding agents that can be used in the nozzles of fire-fighting spray equipment. A random sample of five observations with
an aqueous film-forming foam (AFFF) had a sample mean of 4.5 and a standard deviation of 0.59. A random sample of five
observations with alcohol-type concentrates (ATC) had a sample mean of 6.7 and a standard deviation 0.85. Construct the following:
(a) A 90% two-sided confidence interval on o lo,.
0.0754
3.078
Round your answer to three decimal places (e.g. 98.765).
(b) A 95% two-sided confidence interval on of lo,.Comment on the comparison of the width of this interval with the width of the
interval in part (a).
0.050
4.628
Round your answer to three decimal places (e.g. 98.765).
The 95% confidence interval is
wider
than the 90% confidence interval.
(c) A 90% lower-confidence bound on of lo,.
of
0.075|
Round your answer to three decimal places (e.g. 98.765).
VI
VI
VI
Transcribed Image Text:An article in Fire Technology (LR DiMaio, PJ Chiesa, MS Ott - Fire technology, 1975 - Springer, p. 164-174) investigated two different foam expanding agents that can be used in the nozzles of fire-fighting spray equipment. A random sample of five observations with an aqueous film-forming foam (AFFF) had a sample mean of 4.5 and a standard deviation of 0.59. A random sample of five observations with alcohol-type concentrates (ATC) had a sample mean of 6.7 and a standard deviation 0.85. Construct the following: (a) A 90% two-sided confidence interval on o lo,. 0.0754 3.078 Round your answer to three decimal places (e.g. 98.765). (b) A 95% two-sided confidence interval on of lo,.Comment on the comparison of the width of this interval with the width of the interval in part (a). 0.050 4.628 Round your answer to three decimal places (e.g. 98.765). The 95% confidence interval is wider than the 90% confidence interval. (c) A 90% lower-confidence bound on of lo,. of 0.075| Round your answer to three decimal places (e.g. 98.765). VI VI VI
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps

Blurred answer
Knowledge Booster
Hypothesis Tests and Confidence Intervals for Means
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