True or false: The most common use of a one-sample t procedure is to analyze matched pairs data.
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When performing an experiment with paired individuals, how is randomization implemented?
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What do we compute for each pair of individuals?
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True or false: To analyze matched pairs data we always compute the mean and standard deviation of the differences.
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When performing an experiment with two measurements on each individual, how is randomization implemented?
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In what way is a matched pairs analysis with two measurements on each individual considered a one-sample t procedure?
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Where performing a study when pre-treatment and post-treatment measurements are taken on each individual, how is randomization implemented?
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True or false: If there is no difference between two measurements, then the difference between the two measurements equals zero.
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When analyzing matched pairs data, what plot(s) should be examined for outliers?
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What value should be used for µ0 in the test statistic for a matched pairs t test?
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If we want to determine whether the average sweetness has decreased during storage, what alternative hypothesis do we want to test? Note that the differences are computed as di = fresh minus stored.
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In context, what is µd for this study?
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How is randomization implemented in this experiment?
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True or false: Two of these differences are wrong because all differences should be positive.
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What is sd = 0.909?
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Are there any outliers in the plot of the ten differences?
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What are the degrees of freedom associated with the test statistic ?
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Since we are testing Ha: µd > 0, is this test one-sided or two-sided?
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Because there is insufficient evidence to say the cola lost sweetness after one month of storage, can we say for sure that the cola did NOT lose sweetness on average?
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Why is this study matched pairs?
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For P-value = 0.0467 and α = 0.05, are these results statistically significant?
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Differences for this matched pairs test were computed as difference = taped strength minus sutured strength. The mean difference for the sample of 10 rats is = 144.7. Which was stronger: taped or sutured?
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What does the interval estimate?
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In the context of this example, what is the parameter needing to be estimated with a confidence interval?
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What values are plotted in the dotplot?
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On the basis of the interval estimate for µd, namely (3.87, 22.77), can we conclude that µd differs from zero?
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Using the interval for µd, namely (3.87, 22.77) where difference = time to turn a counterclockwise knob minus time to turn a clockwise knob, which takes right-handed students longer to turn on average: counterclockwise knobs or clockwise knobs?
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