Blood loss was invariably estimated by subtracting the applied irrigation fluid from the postoperative fluid level in the suction bottle.
When p could take either value, 1.0 or zero, in all 5 VI schedules (this happened in 7 of 36 rat × epoch observations), p was invariably estimated to be zero, because under such assumption the mean estimate of b for these rats (0.54 resp/sec) was closer to the mean estimate of b for other rats and epochs (0.42 resp/sec) than to the estimates of w for other rats and epochs (2.28 resp/sec).
Bias caused by misclassification of reported exposures invariably dampens estimated effect sizes and may partly explain the failure to identify significant associations between some potential risk factors and illness.
Note however, that the error in these age estimate are invariably large but the purpose of this calculation was solely to provide a possible upper time limit for the formation of the studied sinters.
Interviewers' estimates of the period of silence magnified it by a factor of from 10 to 100 2 On the other hand, I find, when asking participants in an interview to estimate the time elapsed, invariably the interviewee underestimates the period.
Designs and analyses of clinical trials with a time-to-event outcome almost invariably rely on the hazard ratio to estimate the treatment effect and implicitly, therefore, on the proportional hazards assumption.
This approach also overcomes a serious technical problem associated with employee surveys: the fact that, when asked to estimate time spent on activities, employees invariably report percentages that add up to 100.
This approach also overcomes a serious technical problem associated with employee surveys: when asked to estimate time spent on activities, employees invariably report percentages that add up to 100.
I had just arrived at the Blue Lagoon, a geothermal spa carved into petrified black lava, a tourist haven invariably adored by the estimated 400,000 visitors who pass through its gates each year.
14 Although several techniques have been proposed to estimate the appropriate sample size and statistical power for economic end points in randomised trials, 15 16 17 power calculations are almost invariably based on primary clinical outcomes.
