Consider the following sample.
13, 10, 7, 9, 11, 13
(a) Find the range.
6
(b) Find the variance. (Give your answer correct to two decimal places.)
40.4
(c) Find the standard deviation. (Give your answer correct to two decimal places.)
6.36
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One aspect of the beauty of scenic landscape is its variability. The elevations (feet above sea level) of 12 randomly selected towns in the
Finger Lakes Regions of Upstate New York are recorded here.
1063 1549 604 1225 793 712
604 847 604 631 1360 1144
(a) Find the mean. (Give your answer correct to the nearest whole number.)
928
(b) Find the standard deviation. (Give your answer correct to the nearest whole number.)