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What is the Matlab code to plot a histogram?
imhist(x); where 'x' is your data or image to find histogram.
What is the formula to find the x-bar in statistics?
_x?That's the average.sum of all x divided by nx
What number does x represent in math?
x can represent anything. it depends on the equation. in maths you generally must find the value of x. eg: 8 + x = 15. In this case you must figure out what number added to 8 equals 15. Because the opposite to addition is subtraction, to find x you would do x = 15 - 8. Therefore x = 7. So x has no given value, it all depends on the equation. Hope that helped :)
What is the difference between a line graph and a scatter diagram?
The terminology "scatter diagram" is used in Microsoft Excel and it causes some confusion. The difference is in the x-axis. If my x data is 1900, 1901 2000 and my y data is 100, 300, 3000, then a line plot (in Excel) would show on the x-axis three regularly spaced marks corresponding to 1900, 1901 and 2000. However, on a scatter diagram, intervals are always numerically equal, so 1900 and 1901 are very close together. Scatter diagram, as Microsoft defines them, can show line only, lines and points or just points. It is the preferred plot for data in technical/ scientific work. Where the data is sparse and/or alternative interpretation possible, I would suggest showing both points and lines. Line graphs (again, as Microsoft defines it) can distort relationships. See related link below for some good examples.
How do you find the mean of frequency distributions?
For discrete distributions, suppose the variable X takes the specific value x with probability P(X=x) Then add together x * P(X = x) for all possible values of x. For continuous distributions, suppose the probability distribution function of the variable X is f(x). Then the mean is the integral of x*f(x) with respect to x, taken over all possible values of x.
