A research worker takes `100` observations in an experiment . If he repeats the same experiment by taking `500` observation , how is the probable error affected?

A science student takes 100 observations in an experiment. Second time he takes 600 observations in the same experiment .By doing so the possible error becomes:

A scientist performs an experiment in order to measure a certain physical quantity and takes 100 observations. He repeats the same experiment and takes 400 observations, by doing so

A physical performs an experiment and taken 200 readings. He repeats the same experiment and now takes 800 readingbs. By doing so

A student performed the experiment of glass slab and with different angles of incidence measured the angles of refraction and emergence in each case. He then recorded his observations as given in the table. The correct observation is :

An experimenter tries to determine the molecular weight to glucose by observing the depression in freezing point. He carries out his experiment in duplicates. In one he uses pure water as the solvent and in the other independent experiment by mistake, he uses a 0.1 N aqueous NaCl as the solvent. It is expected that he will report:

In order to sat up standard target of performance for workers, it was necessary for Shiv Ltd. To fix standard time for workers to performs a particular job. For this Mr. Ganesh, the Production Manager of the company observed the workers when they were performing the job. He used a stopwatch in hand and noted down the averge time taken by workers for completion of the job. He repeated the same observation for 100 times and then calculated average time for the performance of the job. This was fixed as the standard time on the basis of which efficient and inefficient workers were distinguished. Identify the technique of scientific management followed by Mr. Ganesh.