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A small group of students was asked, "How many units are you taking this semester?" The...

A small group of students was asked, "How many units are you taking this semester?" The results were: 17, 15, 12, 17, 15, 15, 12. What is the mean?

A small group of students was asked, "How many units are you taking this semester?" The results were: 17, 15, 12, 17, 15, 15, 12. What is the range?

A small group of students was asked, "How many units are you taking this semester?" The results were: 17, 15, 12, 17, 15, 15, 12. What is the sample coefficient of variation?

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Answer #1

a) Mean 10314.7 Σ2.

b) Range is 17-12 = 5

c) n-1

  2(17 - 14.7)2 3(15 14.7)2(12 - 14.7) 7-1

  4.2378

\sigma =\sqrt{4.2378}=2.06

sample coefficient of variation is σ 2.06 =0.14 μ= 14.7

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