Answer to Question 1
Nonsampling error occurs when the sample does not represent the target population due to poor sample design. For example, a convenience sample is used rather than a random sample. Sampling (statistical) error is inherent in any sampling process occurring because samples are only a subset of the total population. Choosing a sampling design that stresses random selection can reduce nonsampling error while sampling error can be minimized by taking a larger sample size.
Answer to Question 2
TRUE
Retrograde pyelogram. A contrast medium is injected into the ureter using a cystoscope, and the X-ra
Phlebotomy. In this common procedure, a syringe needle punctures a vein, usually in the arm, and wit
Enhancement of Contrast
Contrast of ventilation and external and internal respiration.
Bar-eye phenotypes in contrast to the wild-type eye in Drosophila
A sampling of bacterial diversity. Most bacteria do not cause disease.