MATLAB: A Practical Introduction to Programming and Problem Solving
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Chapter 11, Problem 8E
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When there are two independent samples to compare
two population means,
if we don't know that the population variances are
equal, then
it does not matter because there are paired
samples.
do not assume population variances are equal.
assume population variances are equal.
none of these.
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
O No
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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…
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