The phrase "administered randomly" is correct and usable in written English.
It can be used in contexts where something is given or distributed in a random manner, often in research or experimental settings.
Example: "The participants were administered randomly to either the control group or the experimental group to ensure unbiased results."
Alternatives: "distributed at random" or "allocated randomly".
The questionnaires were then administered randomly with the regional distribution as indicated in Table 1.
A total of 250 pretested copies of questionnaire were administered randomly.
However, when the best strategy is implemented, pre-pandemic vaccine administered randomly among the population, targeted to children and teenagers, or targeted to adults, has no effect on infection rates, antiviral usage, and adult days at home (Figures 6f and 6g).
The item sets were administered randomly to 150 respondents (item set A), 143 respondents (item set B), 138 respondents (item set C) and 124 respondents (item set D).
All patients received treatment with ceftriaxone plus levofloxacin and methyl-prednisolone (MPDN) administered randomly and blindly as an initial bolus, followed by a tapering regimen, or placebo.
OHCA patients (504) were enrolled, and 300 mg amiodarone or placebo was administered randomly if no resuscitation was gained after three shocks.
The survey, administered in randomly selected classrooms, also included questions about smoking, drinking, thinking about or attempting suicide, sexual intercourse, condom use, pregnancy and unhealthy eating behaviors like laxative abuse or self-induced vomiting.
Structured questionnaires were administered to randomly selected respondents.
Finally, given the length of the survey, certain modules were administered to randomly selected subsets of the full sample.
In the first wave of this dataset respondents were twice asked to evaluate their health on a five-point scale, using two different sets of descriptors to define the five points, with the ordering of which set was first administered determined randomly.
Data analysis covered those patients administered the randomly allocated investigational drugs.
