Question: The performance time (minutes) for Beethoven's Ninth Symphony is obtained from each of seven compact discs. 66.9 66.2 71.0 68.6 65.4 68.4 71.9 (a) Find

The performance time (minutes) for Beethoven's Ninth Symphony is obtained from each of seven compact discs.

66.9 66.2 71.0 68.6 65.4 68.4 71.9

(a) Find the sample median.
(b) Find the sample mean.
(c) Find the sample standard deviation.
(d) Use software to check your answers to parts (b) and (c) Using R: mean(x) and sd(x) after setting
X = c(66.9,66.2, 71,68.6,65.4,68.4, 71.9)

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