1/courses/14519_2201HY/Two%20Samples%20T-Te: Fit to page Page view A Read aloud 人 Adc 1. In crash tests at 5 miles per hour, the mean bumper repair cost for 14 randomly selected small cars is $473 with a standard deviation of $190. In similar tests of 23 randomly selected midsize cars, the mean bumper repair cost is $741 with a standard deviation of $205. At a 10% significance level, can you conclude that the mean bumper repair cost is less for small cars than it is for midsize cars? Assume that both populations are normally distributed, but the population standard deviations are not equal to each other. a) Identify the following: a = x.3= X2 = b) Symbolically identify: Ho: На Identify the correct test for this problem: Right-tailed test Left-tailed test Two-tailed test Identify the correct test for this problem: Pooled t-test Non-pooled t-test c) Use your calculator to identify the following items: Test Statistic p-value = df = %3D d) How does your p-value compare to alpha? Identify the correct conclusion: REJECT H, DO NOT REJECT H, e) State your final conclusion in regards to this particular problem. 2. A random sample of 17 residents of Delaware County in Pennsylvania has a mean annual income of S42,600 and a standard deviation of S7800. In Greene County in Pennsylvania, a random sample of 18 residents has a mean annual income of S41,800 and a standard deviation of $7375. Assume both populations are normally distributed and the population standard deviation are approximately equal to each other. X1 a) Identify the following: a = b) Find the 95% confidence interval for the difference of the means of the two populations. c) Identify the point estimate and the margin of error. d) Graph the confidence interval. e) Based on the confidence interval that you found, can you definitively conclude that u, > uz: A
1/courses/14519_2201HY/Two%20Samples%20T-Te: Fit to page Page view A Read aloud 人 Adc 1. In crash tests at 5 miles per hour, the mean bumper repair cost for 14 randomly selected small cars is $473 with a standard deviation of $190. In similar tests of 23 randomly selected midsize cars, the mean bumper repair cost is $741 with a standard deviation of $205. At a 10% significance level, can you conclude that the mean bumper repair cost is less for small cars than it is for midsize cars? Assume that both populations are normally distributed, but the population standard deviations are not equal to each other. a) Identify the following: a = x.3= X2 = b) Symbolically identify: Ho: На Identify the correct test for this problem: Right-tailed test Left-tailed test Two-tailed test Identify the correct test for this problem: Pooled t-test Non-pooled t-test c) Use your calculator to identify the following items: Test Statistic p-value = df = %3D d) How does your p-value compare to alpha? Identify the correct conclusion: REJECT H, DO NOT REJECT H, e) State your final conclusion in regards to this particular problem. 2. A random sample of 17 residents of Delaware County in Pennsylvania has a mean annual income of S42,600 and a standard deviation of S7800. In Greene County in Pennsylvania, a random sample of 18 residents has a mean annual income of S41,800 and a standard deviation of $7375. Assume both populations are normally distributed and the population standard deviation are approximately equal to each other. X1 a) Identify the following: a = b) Find the 95% confidence interval for the difference of the means of the two populations. c) Identify the point estimate and the margin of error. d) Graph the confidence interval. e) Based on the confidence interval that you found, can you definitively conclude that u, > uz: A
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
Question
I need help with question #2 part d and e
Transcribed Image Text:1/courses/14519_2201HY/Two%20Samples%20T-Te:
Fit to page
Page view
A Read aloud
人 Adc
1. In crash tests at 5 miles per hour, the mean bumper repair cost for 14 randomly selected small cars is $473
with a standard deviation of $190. In similar tests of 23 randomly selected midsize cars, the mean bumper repair
cost is $741 with a standard deviation of $205. At a 10% significance level, can you conclude that the mean
bumper repair cost is less for small cars than it is for midsize cars? Assume that both populations are
normally distributed, but the population standard deviations are not equal to each other.
a) Identify the following: a =
x.3=
X2 =
b) Symbolically identify: Ho:
На
Identify the correct test for this problem: Right-tailed test
Left-tailed test
Two-tailed test
Identify the correct test for this problem: Pooled t-test
Non-pooled t-test
c) Use your calculator to identify the following items:
Test Statistic
p-value =
df =
%3D
d) How does your p-value compare to alpha?
Identify the correct conclusion:
REJECT H,
DO NOT REJECT H,
e) State your final conclusion in regards to this particular problem.
2. A random sample of 17 residents of Delaware County in Pennsylvania has a mean annual income of S42,600
and a standard deviation of S7800. In Greene County in Pennsylvania, a random sample of 18 residents has a
mean annual income of S41,800 and a standard deviation of $7375. Assume both populations are normally
distributed and the population standard deviation are approximately equal to each other.
X1
a) Identify the following: a =
b) Find the 95% confidence interval for the difference of the means of the two populations.
c) Identify the point estimate and the margin of error.
d) Graph the confidence interval.
e) Based on the confidence interval that you found, can you definitively conclude that u, > uz: A<Hz or do
you not have enough evidence to definitively conclude anything about u and u2?
Hz?
Friday,
T:_
....
DELL
71メ3
&PERSONAL INJUR
10901 AN
AV (pneles
ruisol
- 3431
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 5 steps with 4 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