Sentence examples for a valid instrument from inspiring English sources

The questionnaire proved to be a valid instrument.

The instrumental variables approach requires a valid instrument for required schooling in addition to the usual instrument for schooling.

The French FSDC is a valid instrument in French FM patients with reliability and construct validity.

The SHSQ-25 is a valid instrument for such purpose.

F-stat higher than 16.85 reveals a valid instrument.

The main challenge in applying this procedure is the identification of a valid instrument.

Only the third scenario (c) exemplifies a valid instrument for X.

For this reason, SECOs appear as a valid instrument to analyze OSS systems.