Data are mean ± standard deviation Subjects were tested during one session of approximately 60 minutes in the laboratory.
As swb and sbb are estimates of the true standard deviations subject to random fluctuations, the mean square between groups (MSbetween) could be smaller than the mean squares within groups (MSwithin).
These values were averaged to yield an average simulated RTs standard deviation per subject and plotted against the actual observed RTs standard deviation (figure 2).
With an expected standard deviation within subject measurement of CFR of 0.3, alpha of 0.05 and statistical power of 0.9, we needed to study 13 patients in a cross-over design.
SD: standard deviation; *105 subjects were missing information on income; **19 subjects were missing information on education Overall, 77% of participants reported using some CAM therapy in the 12-month period prior to the interview.
These are calculated by subtracting off the global mean of each subject for the testing or training sessions, respectively, from that subjects performance scores previous to the calculation of standard deviation across subjects.
The value IA/EA represents the ratio of activity concentration between the intraarterial and the extraarterial space as mean and standard deviation over subjects in steady state.
To determine CBF, sheep were subjected to a 5-min 15O-H2O-PET startingrting with a bolus injection of 1064 ± 238 MBq (mean and standard deviation over subjects) into the jugular vein.
The transaxial spatial shift in the alignment procedure, averaged over all slices, was 3.18 ± 1.69 mm (mean and standard deviation over subjects) with a maximum of 8.94 mm for the consecutive TOF-MRA/PET.
However, as would be expected based on statistical principles (the variance of a sample mean is proportional to the distribution's standard deviation), individual subjects were less accurate in estimating the mean under the large variance condition.
The mean coordinates of all ROIs ± standard deviation across subjects are given in Table 1.
