Sentences with phrase «power calculations»

A paragraph discussing power calculations for negative results might be also appropriate for this manuscript.

The participants were 139 high school students, 16 to 18 years of age, sample size was decided by power calculation, and systematic randomized sampling was used.

«Instead of effect sizes of 100 % for progranulin levels, we ask you to provide effect sizes of 20 - 30 % change for power calculations in progranulin brain levels for Figure 3 to determine whether the power value is 0.70.

Visscher and colleagues [83] have provided a web - based power calculation tool for determining the minimum number of twin pairs required to detect A and C in an ACE model of given parameters.

Standard power calculations with 50 in each arm will have 80 % power to detect an effect size of 0.57 between the control and experimental group (i.e., Cohen's d = 0.57).

Thus, there is no formal power calculation for the proposed sample size of 126, but this represents a substantial and adequate number of participants representative of those likely to benefit from the intervention.

In order to detect such an effect size, power calculations showed that a trial would need to include 548 patients.

Instead of effect sizes of 100 % for proganulin levels, we ask you to provide effect sizes of 20 - 30 % change for power calculations in progranulin brain levels for Figure 3 to determine whether the power value is > 0.70.

Did you actually run a power calculation?

(It's the absolute difference in means that matters in a power calculation, not the relative difference)

Most studies were small and none of the studies reported a power calculation to estimate the number of individuals required in order to detect a significant difference in effect for the outcomes measured.

The power calculations were also performed again to ensure the sample size was still adequate for this test.

Kummeling (1998) used 20 dogs in each group, but a power calculation was not performed to assess whether this sample size would be sufficient to attain statistical significance given that the difference in complication rate between the two groups was likely to be small.

A power calculation needs to be performed before the study starts to ensure the groups are an appropriate size.

The power calculation for detecting the association between perceived discrimination and psychotic symptoms (delusional hallucination) was based on Janssen et al. 21 This study differs from our study because it has a longitudinal design and it also includes Dutch inhabitants, not only migrants.

This trial represents the first formal assessment of the HPS intervention and is being undertaken as a pilot study to assess the feasibility of a full randomised controlled trial in the wider clinical setting and to collect data to inform the power calculations for such a study.

Power calculation was conducted a priori based on Cohen (1988).

If several different mother — child interaction factors are investigated simultaneously it is important to base the power calculation on the smallest effect to guarantee sufficient power for all paths in the model.