What are measured and counted values?

Metric data are quantitative observations, often with units of measurement, such as patient age, blood pressure, heart rate, etc. Statistical indicators are often expressed as mean ± standard deviation. Statistics are often expressed as mean ± standard deviation.

As long as the measuring instrument is sufficiently precise and resolving power is sufficient, it is theoretically possible to infinitely subdivide or differentiate the measured values, and to measure values to the Nth decimal place, so these types of characteristics are continuous, and this is what characterizes measurement-type characteristics.

Count numerical data are the results of qualitative observations, such as the patient's gender, occupation, and so on. Statistical indicators are counts of individual attributes or categories, rates, structural percentages, and so on.

Count data are discrete quantities, not continuous, and can be differentiated in a limited way. The most commonly used such as pass and fail, it is divided into two kinds; for example, based on the size and appearance of the fruit, by visualization of the fruit grade into several grades.

Data belongs to the scope of measurement, from the measurement of professional to explain, quantity is defined as the phenomenon, object or substance can be qualitatively distinguished and quantitatively determined properties. Any phenomenon, object or substance in nature has a certain form, and all forms are characterized by quantity. Quantity is the basic concept that characterizes the laws of motion in nature. Quantity is the object to be studied in metrology.

Qualitative distinction refers to the difference in characteristics, such as geometric, electrical, thermal, mechanical quantities, etc., the characteristics of different quantities, they can not be compared with each other. Characteristics of the same amount of the combination of the same kind of quantities, such as work, thermal energy can be expressed in the same unit of joules; thickness, perimeter, wavelength can be expressed in length units of meters.

Quantitative determination refers to specific quantities, also known as specific quantities, such as determining the length of a workpiece, the resistance of a wire, etc.. They can be compared with each other, such as the length of the workpiece, the size of the wire resistance, so also known as the same kind of quantity.

Baidu Encyclopedia - Measurement Value Data