a) Bottle 1
mean = =1.01
spread = range = upper value -lower value = 1.2-0.86 = 0.34
standard deviation == 0.141656
coefficient of variation = = 14.025%
Bottle 2
mean =
spread ,range = 1.32-1.12=0.20
standard deviation
coefficient of variation = (0.07499/1.204) *100 =6.228%
Bottle 3
mean =
range = 0.92-0.73 =0.19
standard deviation =
coefficient of variation = (0.066/0.85)*100 = 7.764%
Bottle4
mean =
range = 0.77-0.58 =0.19
standard deviation =
coefficient of variation = (0.06957/0.67)*100 = 10.38%
bottle 2 has least coefficient of variation. So bottle 2 is more precised.
precision order: bottle 2,bottle 3,bottle4,bottle1
b) pooled standard deviation =
4 Four bottles of red wine, Merlot, were analyzed for residual sugar content and the results...
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