USA trade data analysis

List of contents of this article:

• 1,USA trade data analysis The meaning of system error and accidental error
• 2, The concept of system error
• 3, What is system error?
• 4, The definition of system error and its classification?
• 5, In physics: What is "system error"?

The meaning of system error and accidental error

1. The system error is caused by some imperfections of the instrument, the limitation of measurement technology or the imperfection of the experimental method. It occurs due to inspection conditions and other reasons. For example, when stopping the meter to measure the time, the stop table is inaccurate and slow, and the time interval of the measurement is always small. The accidental error is characterized by its randomness.

2. Accidental error: measurement error, experimental operation error and other man-made and avoidable errors.By the way, system errors are inevitable (but can be reduced by equilibrium friction and other methods), while human errors can be avoided by multiple measurements.

3. Accidental error generally refers to random error, which is a mutually compensatory error formed by a series of small random fluctuations of relevant factors in the measurement process.

4. Random error: It is a mutually compensated error formed by a series of small random fluctuations of relevant factors in the measurement process. System error: refers to a non-random error. For example, the bias error that violates the random principle, the error caused by the registration record in the sampling, etc.

The concept of system error

1. System error refers to the measurement or experimental processIn the middle, the difference between the measurement results and the real value caused by the inherent deviation of factors such as instrument, method or environment. Definition and characteristics of system error: System error is the most common type of error in measurement or experiment.

2. System error refers to a non-random error. For example, the bias error that violates the random principle, the error caused by the registration record in the sampling, etc. It makes the overall characteristic value too high or too low in the sample.

3. System error refers to a non-random error. Under repetitive conditions, the difference between the average of the results obtained by infinitely many measurements of the same measurement and the true value of the measured.

What is system error?

System error refers to a non-random error.For example, the bias error that violates the random principle, the error caused by the registration record in the sampling, etc. It makes the overall characteristic value too high or too low in the sample.

System error is also known as regular error. Under certain measurement conditions, when the same measured size is repeated many times, the size and symbol of the error value (positive value or negative value) remain unchanged; or when the conditions change, the error changes according to a certain law.

System error refers to the difference between the measurement results and the real value caused by the inherent deviation of factors such as instruments, methods or environment during the measurement or experiment. Definition and characteristics of system error: System error is the most common type of error in measurement or experiment.

System error refers to a non-random error. System errorIt refers to the difference between the average value of the results obtained by infinitely many measurements of the same measured subject and the true value of the measured under repetitive conditions. System error is a kind of error caused by some fixed reasons in the analysis process. It is repetitive, one-way and measurable.

System error System error is a non-random error, which is an error that violates the random principle. Generally, it is high or low, but the result obtained is still valid. Among them, the operation error is caused by the reaction of the observer's personal senses and motor organs and personal habits.

The sources of system error are as follows: (1) Instrument error This is caused by the defect of the instrument itself or the failure to use the instrument according to the prescribed conditions. If the zero point of the instrument is not accurate, the instrument is not adjusted well, the outside worldErrors caused by the influence of the environment (light, temperature, humidity, electromagnetic field, etc.) on the measuring instrument.

The definition of system error and its classification?

1. System error can be divided into instrument error, theoretical error, operation error and reagent error. System error refers to a non-random error. For example, the bias error that violates the random principle, the error caused by the registration record in the sampling, etc. It makes the overall characteristic value too high or too low in the sample.

2. Classification of errors: system error, random error, coarse error. System error: Under the same conditions, when the same amount is measured multiple times, the absolute value and symbol of the error remain constant or the error changes according to a certain law.

3. According to its nature and causes, errors can be divided into system errors, random errors and errors. System error: also known as measurable error, constant error or bias.

4. According to the source of error, system error can be divided into method error, instrument error, reagent error and operation error, etc. ( 1) Method error Method error is caused by the imperfection or improper selection of the analysis method itself.

5. Definitions are different. Random errors, also known as accidental errors and indeterminate errors, are mutually compensated errors formed by small random fluctuations in a series of relevant factors in the measurement process. System error refers to a non-random error.

6. System error: (1) Definition: The component of the measurement error in which absolute values and symbols remain constant or change in a predictable way during multiple measurements in the same measurement process.

In physics: What is "system error"?

1. The system error is caused by the imperfect experimental principle, the inaccuracy of the measuring instrument and other factors, such as the voltammetry measurement resistance, the error brought about by the internal connection of the ammeter is due to the experiment designed without considering the internal resistance of the ammeter, and the principle is not perfect;For example, the length measurement of the millimeter scale does not have an accurate measurement with a spiral micrometer.

2. Random error: means that under the same conditions, due to various unpredictable accidental factors, different types of measurement values of the same physical quantity are measured multiple times. Different degrees of error are called random error, also known as accidental error. System error: refers to a non-random error.

3. The system error is defined as "the difference between the average of the results obtained by infinitely many measurements of the same measurement and the true value of the measured under repetitive conditions". The sources of system errors are as follows: (1) Instrument errors are caused by the defects of the instrument itself or the failure to use the instrument according to the prescribed conditions.

4. System error: inevitable error during the experiment,For example, frictional resistance, air resistance, and when using power supply, there are errors in the experiment itself, such as constant voltage. Accidental error: measurement error, experimental operation error and other man-made and avoidable errors.

5. The system error is caused by some imperfections of the instrument, limited measurement technology, or insufficient experimental methods to ensure the correct experimental conditions. For example, when stopping the meter measurement time, the stop meter is inaccurate and slow, and the measurement time interval is always small. The accidental error is characterized by its randomness. Sex.

6. System error is also called regular error. It is that under certain measurement conditions, when the same measured size is repeatedly measured, the size and symbol of the error value (positive value or negative value) remain unchanged; or the error changes according to a certain law when the conditions change.