STEP ONE: STEP TWO: STEP THREE: STEP FOUR: STEP FIVE: STEP SIX: Test Statistic: Critical Value(s):

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
icon
Concept explainers
Question
8. A study of seat belt use involved children who were hospitalized after motor vehicle crashes. For a group
of 123 children who were wearing seat belts, the number of days in intensive care units (ICU) has a mean of
0.83 days and a standard deviation of 1.77 days. For a group of 290 children who were not wearing
seatbelts, the number of days spent in ICUS has a mean of 1.39 days and a standard deviation of 3.06 days.
Use 0.05 significance level to test the claim that children wearing seat belts have a lower mean length of time
in an ICU than the mean for children not wearing seat belts. What important conclusion do the results
suggest?
STEP ONE:
STEP TWO:
STEP THREE:
STEP FOUR:
STEP FIVE:
STEP SIX:
Test Statistic:
Critical Value(s):
STEP SEVEN:
Transcribed Image Text:8. A study of seat belt use involved children who were hospitalized after motor vehicle crashes. For a group of 123 children who were wearing seat belts, the number of days in intensive care units (ICU) has a mean of 0.83 days and a standard deviation of 1.77 days. For a group of 290 children who were not wearing seatbelts, the number of days spent in ICUS has a mean of 1.39 days and a standard deviation of 3.06 days. Use 0.05 significance level to test the claim that children wearing seat belts have a lower mean length of time in an ICU than the mean for children not wearing seat belts. What important conclusion do the results suggest? STEP ONE: STEP TWO: STEP THREE: STEP FOUR: STEP FIVE: STEP SIX: Test Statistic: Critical Value(s): STEP SEVEN:
Expert Solution
Given

n1 = 123

n2 = 290

 

x1 = 0.83

x2 =1.39

 

s1 = 1.77
s2 =3.06

 

trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 7 images

Blurred answer
Knowledge Booster
Correlation, Regression, and Association
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
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