what is the measure of replication in a random sample why do observers take different measurements can you measure the same length in the same experiment with 3 observers? how does repeatability affect measurement errors how do you determine the consistency and repeatability of data sets when two measurements are taken in a trial, how many are they taken how many observations for the same length how can the data set be replicated why are late measurements used in data sets how many observers are in the study of weight and length how to tell if measurements can be repeated on same person at the same time how many people are in a data set with multiple observers when is the same measurement repeated in the data set how many observations for a random sample why does a measurement of length and weight vary between observers what are some problems with repeatability of measurements what is the best way to figure out how each individual observer's measurements vary between the late and early trials? how do you calculate repeatability of measurements on different observers? how is the data set duplicate how does one observer differ between two additional observers?