The phrase "a mixed sample of" is correct and usable in written English.
It can be used when referring to a collection that includes different types or categories of items or data.
Example: "The researchers analyzed a mixed sample of soil from various locations to assess the overall health of the ecosystem."
Alternatives: "a diverse collection of" or "a varied selection of".
This study examines the ability of the body adiposity index to estimate percent body fat in a mixed sample of adolescents.
Between-factor correlations were also compared between sub-groups of owners and dogs based on demographic factors, to investigate the stability of these relationships in a mixed sample of volunteer pet dog owners and pet dogs.
The second is a mixed sample of internally produced downward-going muons and externally produced upward-going muons stopping inside the detector.
Hewitt et al. (1998) examined perfectionism as a multidimensional construct in a mixed sample of unipolar and BD patients.
Although it's now possible to quickly sequence the DNA from a mixed sample of microbes, the role of individual genes and the way species influence one another in their natural environments are largely unknown.
Nadelson and Sinatra (2010), for example, used the MATE on a mixed sample of elementary, middle, and high school teachers (about evenly split between early- and late-grade levels).
Sakr et al [22] measured the time course of LBP levels in a mixed sample of 327 critically ill patients in which only 55 patients had severe sepsis.
We recently reported that polymorphic variants in the TPH2 gene (rs4641527; responsiblers1023990; rs6582071), responsible for human brain synthesis, predicted subtle variations in 5-HT synthesis in the OBFC in a mixed sample of healthy volunteers and patients [57].
To increase the proportion of Hpa transcripts in a mixed sample of plant and pathogen RNA we used a highly virulent Hpa isolate (Waco9) to infect a hyper-susceptible Arabidopsis mutant (eds1) [40] and collected tissues at a time point of maximum hyphal and haustorial growth.
The IOC questionnaire was originally developed and validated among a mixed sample of cancer survivors.
A mixed sample of 75 substance abusers and dual diagnosis patients were included in the study.
