Confidence interval around the mean

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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

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: EM1317106

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