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Considering normal reference intervals utilized, ______ percent of the time, well (healthy) patients will fall outside this range, and ______ percent of the time, well (healthy) patients will fall within this range. 

The within-run component of variation is caused by: 1. sampling and pipetting precision. 2. short-term variations in temperature of the instrument. 3. instability of the calibration curve. 4. short-term variations in the stability of the instrument.

All of the following describe the within-run replication experiment except:

Suppose you are setting up an assay in which patient samples are run in duplicate. All duplicate patient results match except for one. Which of the following would be a reasonable explanation (or explanations) for the lack of reproducibility for the patient results?

Suppose your laboratory uses the ELISA configuration in which the antibody has been immobilized onto the solid phase. How would the result of the assay for a patient whose specimen is in a specific well be affected by improperly washing the solid phase of that particular well?

Random error is associated with ______, and systematic error is associated with ______. The degree of ______ is described by the standard deviation or the coefficient of variation. 

Which of the following statements are correct regarding controls and calibrators? 1. Controls may not be used as calibrators. 2. Calibrators may not be used as controls. 3. Controls establish correspondence of instrument output signal with known concentration. 4. Calibrators establish correspondence of instrument output signal with known concentration.

Miguel está comprando los libros.

Antes(before) de ir a Ecuador hay que __________.

Uds. __________________ un libro en la biblioteca.