Matlab, Fourth Edition: A Practical Introduction to Programming and Problem Solving
4th Edition
ISBN: 9780128045251
Author: Stormy Attaway Ph.D. Boston University
Publisher: Elsevier Science
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Chapter 3, Problem 33E
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Does 10K running time increase when the runner listens to music? Nine runners were timed as they ran a
10K with and without listening to music. The running times in minutes are shown below.
With
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57 40 39 60 58 47 50 42 45
58 36 39 51 56 50 52 41 41
Assume a Normal distribution. What can be concluded at the the a 0.10 level of significance?
For this study, we should use t-test for the difference between two dependent population means
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a. The null and alternative hypotheses would be:
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H₁ ud
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b. The test statistic
=
(please show your answer to 3 decimal places.)
c. The p-value
(Please show your answer to 4 decimal places.)
d. The p-value is >v
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e. Based on this, we should fail to reject
f. Thus, the final conclusion is that ...
the null hypothesis.
The results are statistically significant at a = 0.10, so there is sufficient evidence to conclude
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Question 5
10 pts 1 Details
A college administrator claims that 80% of college students purchase their books from the campus
bookstore. You this is inaccurate and form a random sample of 57 students at that college and find that 36
of them purchased their books from the bookstore. Test the administrator's claim using a level of
significance of 1%.
a. What type of test will be used in this problem?
A test for a proportion
b. What evidence justifies the use of this test? Check all that apply
np5 and nq > 5
The population standard deviation is not known
The original population is approximately normal
There are two different samples being compared
The sample size is larger than 30
The sample standard deviation is not known
The population standard deviation is known
c. Enter the null hypothesis for this test.
Ho p
0.80
d. Enter the alternative hypothesis for this test.
H₁p
0.80
e. Is the original claim located in the null or alternative hypothesis?
Null Hypothesis
f. What is the test…
Are there less children diagnosed with Autism Spectrum Disorder (ASD) in states that have larger urban
areas over states that are mostly rural?
Assume data were collected from a fairly urban state and they found 195 eight-year olds diagnosed with
AGD out of 18183 eight-year olds evaluated.
Assume data were then collected for a fairly rural state and they found 54 eight-year olds diagnosed with
AGD out of 2179 eight-year olds evaluated.
is there enough evidence to show that the proportion of children diagnosed with ASD in the fairly urban
state is lower than the proportion in the fairly rural state?
a.) Test at the 3% level
b.) Compute a 97% confidence interval for the difference in proportions.
Use the following steps for the hypothesis test.
For the confidence interval you do not need to do all the steps since you did some of them already in
hypothesis test.
Part a.) HYPOTHESIS TEST
Parameter
What is the correct parameter symbol and wording for population 1?
P
The proportion of all…
Chapter 3 Solutions
Matlab, Fourth Edition: A Practical Introduction to Programming and Problem Solving
Chapter 3, Problem 3.1PChapter 3, Problem 3.2PChapter 3, Problem 3.3PChapter 3, Problem 3.4PChapter 3, Problem 3.5PChapter 3, Problem 3.6PChapter 3, Problem 3.7PChapter 3, Problem 3.8PChapter 3, Problem 3.9PChapter 3, Problem 3.10P
Chapter 3, Problem 1EChapter 3, Problem 2EChapter 3, Problem 3EChapter 3, Problem 4EChapter 3, Problem 5EChapter 3, Problem 6EChapter 3, Problem 7EChapter 3, Problem 8EChapter 3, Problem 9EChapter 3, Problem 10EChapter 3, Problem 11EChapter 3, Problem 13EChapter 3, Problem 12EChapter 3, Problem 17EChapter 3, Problem 14EChapter 3, Problem 15EChapter 3, Problem 16EChapter 3, Problem 19EChapter 3, Problem 18EChapter 3, Problem 20EChapter 3, Problem 21EChapter 3, Problem 25EChapter 3, Problem 27EChapter 3, Problem 22EChapter 3, Problem 23EChapter 3, Problem 24EChapter 3, Problem 26EChapter 3, Problem 28EChapter 3, Problem 29EChapter 3, Problem 30EChapter 3, Problem 31EChapter 3, Problem 32EChapter 3, Problem 33EChapter 3, Problem 35EChapter 3, Problem 34E
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