Free random number generator is a true random number generating software. Our random number generator uses outside atmospheric noise to generate a much more true random number. The package 'randomForest' has the function randomForest which is used to create and analyze random forests. The basic syntax for creating a random forest in R is − randomForest(formula, data) Following is the description of the parameters used − formula is a formula describing the predictor and response variables.

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In a random collection of data from independent sources, it is generally observed that the distribution of data is normal. Which means, on plotting a graph with the value of the variable in the horizontal axis and the count of the values in the vertical axis we get a bell shape curve. The center of the curve represents the mean of the data set. In the graph, fifty percent of values lie to the left of the mean and the other fifty percent lie to the right of the graph. This is referred as normal distribution in statistics.

R has four in built functions to generate normal distribution. They are described below.

Following is the description of the parameters used in above functions −

x is a vector of numbers.
p is a vector of probabilities.
n is number of observations(sample size).
mean is the mean value of the sample data. It's default value is zero.
sd is the standard deviation. It's default value is 1.

dnorm()

This function gives height of the probability distribution at each point for a given mean and standard deviation.

When we execute the above code, it produces the following result −

pnorm()

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This function gives the probability of a normally distributed random number to be less that the value of a given number. It is also called 'Cumulative Distribution Function'.

When we execute the above code, it produces the following result −

qnorm()

This function takes the probability value and gives a number whose cumulative value matches the probability value.

When we execute the above code, it produces the following result −

rnorm()

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This function is used to generate random numbers whose distribution is normal. It takes the sample size as input and generates that many random numbers. We draw a histogram to show the distribution of the generated numbers.

When we execute the above code, it produces the following result −