Plotting the confidence interval

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Reference no: EM1317203

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
4	7	5
3	6	4
4	8	5
3	9	7
5	7	5
4	7	7
3	8	7
4	6	8
5	8	6

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?

Reference no: EM1317203

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