2. Given the following data, calculate the mean, median, mode, midrange, standard deviation, and variance.
14.35, 17.22, 18.90, 20.02, 34.43, 12.85, 18.49, 7.62, 19.93
(a) Mean | (b) Median | (c) Mode |
(d) Range | (e) Standard Deviation | (f) Variance |
7.62, 12.85, 14.35, 17.22, 18.49, 18.90, 19.93, 20.02, 34.43
a) Mean = (7.62 + 12.85 + 14.35 + 17.22 + 18.49 + 18.90 + 19.93 + 20.02 + 34.43)/9 = 18.201
b) Median = 18.49
c) Mode = There is no mode in the data set.
d) Range = 34.43 - 7.62 = 26.81
f) Variance = ((7.62 - 18.201)^2 + (12.85 - 18.201)^2 + (14.35 - 18.201)^2 + (17.22 - 18.201)^2 + (18.49 - 18.201)^2 + (18.90 - 18.201)^2 + (19.93 - 18.201)^2 + (20.02 - 18.201)^2 + (34.43 - 18.201)^2)/8 = 53.329
e) standard deviation = = 7.303
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