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(i) They tend to accumulate with increase in number of observations.
(ii) They are mainly caused by limitations of instrument and observer.
(i) Weight of a quantity is directly proportional to number of times the quantity is measured.
(ii) Weights are assigned to an observation as per the accuracy and precision with which the observations are made.
(iii) If the observation is repeated large number of times, weight is proportional to the square of probable error in measurement.
(iv) The corrections to be applied to observed quantities is directly proportional to their weights.
Which of the above statements are correct?
(i) have maximum chances of being true than any other value.
(ii) have 50% chances of being true.
(iii) is derived from probability curves
(iv) is equal to weighted arithmetic mean of all the observations.
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Tags :AE & JE Exams