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Q: The difference between the most probable value of a quantity and observed value is
  • A. True error
  • B. Weighted observation
  • C. Conditional error
  • D. Residual error
Correct Answer: Option D - Residual error– It is the difference between the most probable value of a quantity and its observed value. •The most probable value of a quantity is the one which has more chances of being true than any other value. Residual error= Observed value–most probable values Conditional error– When there are numbers of observation taken at the same station then the condition that the sum of all the angles should be equal to 360⁰ must be satisfied, if not then the difference from 360⁰ is the error of the station. True error– A true value of a quantity and its observed value. Safe error– The important function of a surveyor is to secure measurements that are correct with in a certain limit of error prescribed by the nature and purpose of a particular survey.
D. Residual error– It is the difference between the most probable value of a quantity and its observed value. •The most probable value of a quantity is the one which has more chances of being true than any other value. Residual error= Observed value–most probable values Conditional error– When there are numbers of observation taken at the same station then the condition that the sum of all the angles should be equal to 360⁰ must be satisfied, if not then the difference from 360⁰ is the error of the station. True error– A true value of a quantity and its observed value. Safe error– The important function of a surveyor is to secure measurements that are correct with in a certain limit of error prescribed by the nature and purpose of a particular survey.

Explanations:

Residual error– It is the difference between the most probable value of a quantity and its observed value. •The most probable value of a quantity is the one which has more chances of being true than any other value. Residual error= Observed value–most probable values Conditional error– When there are numbers of observation taken at the same station then the condition that the sum of all the angles should be equal to 360⁰ must be satisfied, if not then the difference from 360⁰ is the error of the station. True error– A true value of a quantity and its observed value. Safe error– The important function of a surveyor is to secure measurements that are correct with in a certain limit of error prescribed by the nature and purpose of a particular survey.