To compare focometer and autorefractor in the measurement of refractive errors among students in an underserved community of sub-Saharan Africa. A total of 230 ...

This is a preview. Log in through your library . Abstract The standard error of measurement is potentially a very useful statistic for the classroom teacher-tester ...

Data that are collected for the production of official statistics or, more generally, for statistical analyses nearly always contain measurement errors. National statistical institutes, other ...

Figure 1 shows that individual measurement values hover around a mean value and the difference between the mean value and true value is the systematic error of ...

Test instruments such as oscilloscopes and DMMs (digital multimeters) often let you get the measurement results you need with just the press of a button. But the number on a meter's display or the ...

A program for calibration and routine testing of weighing instruments ensures accurate results. A measurement of any kind is affected by the errors and uncertainties that exist in that measurement ...

Nielsen’s out-of-home measurement gaffe was worse than the ratings company has presented it, according to a new study by the country’s major TV networks. Last month, Nielsen admitted it had been ...

Objectives This study aimed to (1) develop a new measure of adherence to exercise for musculoskeletal (MSK) pain (Adherence To Exercise for Musculoskeletal Pain Tool: ATEMPT) based on previously ...

CBSE Class 11 Physics notes on Chapter 2, Units and Measurement (Part 3) are available here. Important topics covered in this part are Accuracy, Precision, Errors of ...