To figure out the source of your stomach problems, your doctor may order a stool sample culture test. Learn what you need to know before the test, how it's performed, and what the results mean.

Note: If an infant is providing the urine sample, the clean catch kit will consist of a plastic bag with a sticky strip on one end that fits over the baby’s genital area, as well as a sterile ...

Representative Sample vs. Random Sample: An Overview Representative sampling and random sampling are two techniques to help ensure that data is accurate and unbiased. These sampling techniques are ...

Typically, representative sample characteristics are focused on demographic categories. Some examples of key characteristics can include sex, age, education level, socioeconomic status, and ...