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Is chemical equation literal expression or symbolic expression
Symbol
What's the difference between chemical equation, literal expression and symbolic expression
Chemical equations should be written with chemical symbols and balanced. Literal expressions should be expressed with words without balancing. Symbolic expressions should be expressed with symbols without balancing
What is the reaction principle of making carbon dioxide in the laboratory
The chemical equation is: CaCO3 + 2HCl = CaCl2 + H2O + CO2 (gas)
The difference between frequency distribution histogram and frequency distribution histogram
Frequency distribution histogram ordinate: frequency / group distance
Frequency distribution histogram ordinate: frequency
Everything else is the same
What is the vertical coordinate of frequency distribution histogram? How can it be calculated? For example, frequency is 1, frequency is 0.02, group distance is 60, sample size is 50, divided into 8 groups?
The ordinate is frequency / group distance!
The calculation method of cumulative frequency and cumulative frequency is shown in the figure!
In mathematical statistics, what is frequency? What is frequency?
In statistics, a sample is divided into several groups according to a certain method
Frequency: the ratio of the frequency of a group to the sample size is called the frequency of the group. With the frequency (or frequency), we can know the distribution of the number
In the numeral 696699669999, the frequency of the numeral "6" is () and (), respectively
10 0.5
The relationship between frequency m, frequency P and total number of data n is ()
A. n=mpB. p=mnC. n=m+pD. m=np
∵ the frequency is m, the frequency is p, the total number of data is n, ∵ M = NP
What's the difference? Why probability = frequency
Experimental estimation probability = frequency / total
However, there are errors in the experimental estimation of probability
When the number of tests approaches infinity, the error tends to zero
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