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 1, Problem 20E
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Does it take less time for seeds to germinate if they are near rock music that is continuously playing
compared to being near classical music?
The time (in days) to germinate was recorded for 30 seeds that were randomly exposed to rock music took
and 26 seeds that were randomly exposed to classical music.
a. Based on the given information, select ALL that are true about these data.
There are two independent random samples of numerical data.
Samples are not random.
There are two paired random samples of numerical data.
Each sample size is large enough.
Each population has a normal distribution.
At least one sample size is not large enough.
Data are not numerical.
Each sample data have approximately a normal distribution with no outliers.
b. Are all the assumptions met for a two-sample t-test?
Yes
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The following data show the results of two random samples that measured the average number of minutes
per charge for AA Lithium-ion (Li-ion) rechargeable batteries versus Nickel-Metal Hydride (NiMH)
rechargeable batteries.
Click this button to reveal the data. Click again to collapse it.
Li-ion
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If you want to do well, please avoid using Google sheets.
Perform a hypothesis test using significance level (a) = .02 to determine if the true average number of
minutes per charge for NiMH batteries is different from that for Li-ion batteries.
a. Perform a two-sample t test to test the claim that the true average number of minutes per charge
for Li-ion batteries is different from that for NiMH batteries.
Fill in the blanks for the alternative hypothesis of this test.
Select an answer Select an answer
Based on your work, answer the following questions.
The observed difference in mean…
mts
ces
urces
A group of economists wants to compare the mean annual leave among the US and EU workers. Two
samples of US and EU workers were obtained independently and analyzed.
The sample of 45 US workers had the mean annual leave of 18.8 days and the standard deviation 9.05 days.
The sample of 31 EU workers had the mean annual leave of 25.6 days and the standard deviation 5.38 days.
Use 4% level of significance to decide whether there is sufficient evidence that mean annual leave of US
workers is less than mean annual leave of EU workers.
Procedure: Two means T Hypothesis Test
Assumptions: (select everything that applies)
Normal populations
The number of positive and negative responses are both greater than 10 for both samples
Population standard deviations are known
Simple random samples
Population standard deviation are unknown and not assumed equal
Sample sizes are both greater than 30
Independent samples
Paired samples
Population standard deviation are unknown but assumed equal…
Chapter 1 Solutions
Matlab, Fourth Edition: A Practical Introduction to Programming and Problem Solving
Chapter 1, Problem 1.1PChapter 1, Problem 1.2PChapter 1, Problem 1.3PChapter 1, Problem 1.4PChapter 1, Problem 1.5PChapter 1, Problem 1.6PChapter 1, Problem 1EChapter 1, Problem 2EChapter 1, Problem 3EChapter 1, Problem 4E
Chapter 1, Problem 5EChapter 1, Problem 6EChapter 1, Problem 7EChapter 1, Problem 8EChapter 1, Problem 9EChapter 1, Problem 10EChapter 1, Problem 11EChapter 1, Problem 17EChapter 1, Problem 12EChapter 1, Problem 13EChapter 1, Problem 14EChapter 1, Problem 15EChapter 1, Problem 16EChapter 1, Problem 18EChapter 1, Problem 19EChapter 1, Problem 20EChapter 1, Problem 21EChapter 1, Problem 22EChapter 1, Problem 23EChapter 1, Problem 24EChapter 1, Problem 25EChapter 1, Problem 26EChapter 1, Problem 27EChapter 1, Problem 28EChapter 1, Problem 29EChapter 1, Problem 30EChapter 1, Problem 31EChapter 1, Problem 32EChapter 1, Problem 33EChapter 1, Problem 34EChapter 1, Problem 35EChapter 1, Problem 36E
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