a. True
b. False: in the video instruction for today, measurement error was defined as "errors in observation that are introduced by the fact that we cannot measure our research subjects directly, but must take their word for it" .
Well it was close but not close enough. Measurement error, also called as observational error is defined as the difference between a measured quantity and its true value that includes random error and systematic error. Its basic definition (measurement error) is much broader than this simple difference between what is observed or recorded and what actually was.
