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Three groups of students agree to participate in a study of the effect of music on reading comprehension. The participants in each group take a Nelson-Denny reading skills test under different conditions. One group listens to rock music while taking the test. A second group takes the test while listening to classical music and a third does not listen to any music while taking a test. Their scores are presented below:
Rock
Classical
No music
4
8
6
7
5
3
9
Compute the 95% confidence interval around the mean of each of the three groups and plot the confidence interval in the space provided above.
Yes/No - Does the rock music mean differ significantly from the mean of the No music.
Yes/No-Does the classical music mean differ significantly from the rock music?
Yes/No-Does the classical music mean differ significantly from the no music mean?
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