Question

defined them :
1) Error of measurement.
2) Type of error

Answer 1

A type I error (or error of the first kind) is the incorrect rejection of a true null hypothesis. Usually a type I error leads one to conclude that a supposed effect or relationship exists when in fact it doesn't. Examples of type I errors include a test that shows a patient to have a disease when in fact the patient does not have the disease, a fire alarm going on indicating a fire when in fact there is no fire, or an experiment indicating that a medical treatment should cure a disease when in fact it does not.
A type II error (or error of the second kind) is the failure to reject a false null hypothesis. Examples of type II errors would be a blood test failing to detect the disease it was designed to detect, in a patient who really has the disease; a fire breaking out and the fire alarm does not ring; or a clinical trial of a medical treatment failing to show that the treatment works when really it does.



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Answer 2

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1. $Error Of Measurement:-$
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Measuring process is essentially a process of to measure any physical quatity with compare it with a standard unit of that quantity.
No measurement is perfect as the error involved in the process can't be renewed completely. The different in the true value and the measuring value is known as error of measurement.

2. Type Of Error :
● Systematic Error
● Random Error
● Gross Error

◆ Systematic Error : These are those error in which causes are known therefore can be minimized.
a. Instrumental Error : It may be due to inexperienced by the observer and manufactured of the instrument.

b. Personal Error : It may be due to inexperienced of the observer.

c. Weather Error : It may be due to external causes like changes in temperature, pressure, humidity etc.

◆Random Error : These are those error in which causes are not known and therefore, it is impossible to eliminate Random error. It can be minimized by repeating the observe a large number of times and than tape the Arithmetic mean.

◆Gross Error : These are those error arrival these due to account of sheur carelessness of the observer like reading the instrument without setting it properly.

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