• y-component (coefficient of variation cv of the amplitude). . .Find the coefficient
of variation cv from the mean and standard deviation of the DO to determine the
amplitude (i.e., the activity of the system) of the DO.
cv ¼ σ=μ
σ: standard deviation μ : population mean
When the microcosm is cultured three (n ¼ 3) or five (n ¼ 5) times, find the mean
slope a and the coefficient of variation cv for each sample size (n). Then, suppose
that each numerical value (i.e., the means) of the slope a and the coefficient of
variation cv is normally distributed. In a normal distribution, as shown in Fig. 2, the
probability of settling is within Æ 1σ of the mean (i.e., of falling within one standard
deviation and can be considered as an error), which is 68.26%. Therefore, evaluations should not be influenced if the slope a and the coefficient of variation cv in each
additional system are within Æ 34.13% of each value in the control system. Additionally, in order to consider whether Æ 1σ represents an error, (i) assume that the
error in the control system fits within Æ 1σ, and (ii) evaluate the influence more
strictly.
In addition, the basis of Æ 1σ is (1) supposing the error in the control system fits
within range of Æ 1σ and (2) evaluating it more severely.
Respiration Amount Assessment
The quantity of respiration is, as shown in Fig. 3, the geometrical expression of the
total amount of respiration within an area of the graph, which is displayed over an
Fig. 2 Standard division and probability
Appendices
217
of variation cv from the mean and standard deviation of the DO to determine the
amplitude (i.e., the activity of the system) of the DO.
cv ¼ σ=μ
σ: standard deviation μ : population mean
When the microcosm is cultured three (n ¼ 3) or five (n ¼ 5) times, find the mean
slope a and the coefficient of variation cv for each sample size (n). Then, suppose
that each numerical value (i.e., the means) of the slope a and the coefficient of
variation cv is normally distributed. In a normal distribution, as shown in Fig. 2, the
probability of settling is within Æ 1σ of the mean (i.e., of falling within one standard
deviation and can be considered as an error), which is 68.26%. Therefore, evaluations should not be influenced if the slope a and the coefficient of variation cv in each
additional system are within Æ 34.13% of each value in the control system. Additionally, in order to consider whether Æ 1σ represents an error, (i) assume that the
error in the control system fits within Æ 1σ, and (ii) evaluate the influence more
strictly.
In addition, the basis of Æ 1σ is (1) supposing the error in the control system fits
within range of Æ 1σ and (2) evaluating it more severely.
Respiration Amount Assessment
The quantity of respiration is, as shown in Fig. 3, the geometrical expression of the
total amount of respiration within an area of the graph, which is displayed over an
Fig. 2 Standard division and probability
Appendices
217