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Consider the following statements: 1. Precision shows how close the measured value is to the true value of the quantity. 2. Instrumental errors and personal errors are the sources of random errors. 3. Random errors are random with respect to the sign and shape of the quantity. 4. Absolute error is the magnitude of difference between individual value and the true value of the quantity Which of the above statements are correct.

Consider the following statements: 1. Precision shows how close the measured value is to the true value of the quantity. 2. Instrumental errors and personal errors are the sources of random errors. 3. Random errors are random with respect to the sign and shape of the quantity. 4. Absolute error is the magnitude of difference between individual value and the true value of the quantity Which of the above statements are correct. Correct Answer 3) and 4) only

CONCEPT:

  • Error: It is the Uncertainty in measurement by any measuring instrument.
  • Error in measurements can be broadly classified as
  1. Systematic errors
  2. Random errors.
  • Systematic errors are those that tend to be in one direction, either positive or negative.
  • Random errors are those errors that occur irregularly and are random with respect to sign and shape.
  • Absolute error is the magnitude of difference between individual value and the true value of the quantity
  • Precision: It tells us to what resolution or limit can a quantity be measured.

EXPLANATION:

  •  The accuracy of measurement shows how close the measured value is to the true value of the quantity. Precision actually tells us to what resolution or limit can a quantity be measured.
  • Instrumental errors and personal errors are the sources of systematic errors. The other source is an imperfection in experimental technique or procedure.
  • Random errors are those errors that occur irregularly and are random with respect to sign and shape.
  • Absolute error is the magnitude of difference between individual value and the true value of the quantity

Related Questions

Consider the following statements regarding precision in measurements of a quantity: 1. Precision is the measure of the spread of the incident errors. 2. Precision is independent of the realizable correctness of the measurement. 3. Precision is usually described in terms of number of digits used in the measurement by a digital instrument. Which of the above statements are correct?
Consider the following statements for dynamic characteristics of a measurement system: 1. Fidelity is defined as the degree to which a measurement system indicates changes in the measured quantity without any dynamic error. 2. Dynamic error is the difference between the true value of the quantity changing with time and the value indicated by the measurement system if no static error is assumed. 3. Measuring lag is the retardation in the response of a measurement system to changes in the measured quantity. Which of the above statements are correct?
Which two classes use the Shape class correctly?
A. public class Circle implements Shape { private int radius; }B. public abstract class Circle extends Shape { private int radius; }C. public class Circle extends Shape { private int radius; public void draw(); }D. public abstract class Circle implements Shape { private int radius; public void draw(); }E. public class Circle extends Shape { private int radius; public void draw() { /* code here */ } }F. public abstract class Circle implements Shape { private int radius; public void draw() { /* code here */ } }
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“In any network containing more than one sources of e.m.f. the current in any branch is the algebraic sum of a number of individual fictitious currents (the number being equal to the number of sources of e.m.f.), each of which is due to separate action of each source of e.m.f., taken in order, when the remaining sources of e.m.f. are replaced by conductors, the resistances of which are equal to the internal resistances of the respective sources”.The above statement is associated with
“In any network containing more than one sources of e.m.f. the current in any branch is the algebraic sum of a number of individual fictitious currents (the number being equal to the number of sources of e.m.f.), each of which is due to separate action of each source of e.m.f., taken in order, when the remaining sources of e.m.f. are replaced by conductors, the resistances of which are equal to the internal resistances of the respective sources”.
The above statement is associated with
Which of the following statement(s) is/are true? A. Shape: According to the type of matter, the shape changes depending on the location of the particles. For example, solids have a definite shape, whereas liquids acquire the shape of their vessel and, seen, gases have no shape. B. Filling a vessel of water: It is a property of matter, which decreases in volume under high pressure, and gas shows this property.
Each item consists of six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and markyour response accordingly on the Answer Sheet.
S1 :The dawn of the information age opened up great opportunities for the beneficial use of data.
S6 :To some, in this era of Big Data analytics and automated, algorithm-based processing of zettabytes of information, the fear that their personal data may be unprotected may conjure up visions of a dystopian world in which individual liberties are compromised.
P :But it is the conflict between the massive scope for progress provided by digital era and the fear of loss of individual autonomy that is foregrounded in any debates about data protection laws.
Q : It also enhanced the perils of unregulated and arbitrary use of personal data.
R : It is against this backdrop that the White Paper made public to elicit views from the public on the shape and substance of a comprehensive data protection law assumes significances.
S :Unauthorised leaks, hacking and other cyber crimes have rendered databases vulnerable.
The correct sequence should be
Two statements are given followed by four conclusions numbered I, II, III and IV. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: I. Some forms are open ended. II. All close ended are forms. Conclusions: I. No open ended are forms. II. Some close ended are open ended. III. No forms are close ended. IV. All open ended are close ended.