The phrase "and a second random" is not complete and lacks context, making it difficult to determine its correctness in written English.
It could be used in contexts where you are listing or describing multiple random items or selections, but it needs additional information to be fully clear.
Example: "We selected a first random sample and a second random sample for our study."
Alternatives: "and another random" or "and a different random".
Consider a random sample x 1,x 2,…,x 25 from a N 300,102) distribution, and a second random sample y 1,y 2,…,y 5 of outlier observations from a N(400,52) distribution.
Let us assume a random variable that follows the distribution N ( 0, σ w 2 Σ y - 2 ) and a second random variable that follows the distribution N ( 0, ( χ - 1 ) I ).
A proportional stratified random sample of 285 subjects and a second random sample of 100 outpatients, drawn on March 2004, have been employed for the analysis.
They compared the performance of 15-year-old adolescents with SLI to typically developing age-matched controls using an SRT task composed of a random phase, followed by a pattern phase and then a second random phase.
Then one of the three possible events is chosen by picking a random number between 0 and ktot, a second random number is picked to choose the site where the event will occur, and a third one is chosen to increment the simulated time according to eq 23, and if the termination criterion is met, the simulation will finish; otherwise the loop is entered again.
Models were developed on a random sample of 5 million people and validated on a second random sample of 5 million people and a third sample of 5 million people drawn from a random sample of practices.
Thus, the model is fitted with holding nested within parish as a random effect and the year as a second random effect.
Adding maternal identity as a second random effect resulted in a small and nonsignificant model improvement (LRT = 2.20, P = 0.14).
For this case we treated trial (describing 11 studies) as a second random effect.
Therefore, we ran a second random effects model excluding study #43 (see Table 3).
What if you and a buddy just want to play and not take on a third random?
