Solving for Median of P(r) with Exponential Terms

In summary, the median of a probability distribution is the value that separates the data into two equal halves. To solve for the median of P(r) with exponential terms, you must find the cumulative distribution function and set it equal to 0.5. The median can be negative and is not always equal to the mean, as it is not affected by outliers. Changes in the distribution parameters, specifically the rate parameter, can affect the median.
  • #1
apiwowar
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Homework Statement



P(r) = 1-(2r2+2r+1)e-2r

i know that p(r) is just the derivative of P(r)

to find the median i would just integrate from o to r and set that equal to .5
but when you integrate youre just going back to P(r) from 0 to r

so i get

1-(2r2+2r+1)e-2r = .5

how would i go about solving this since i have the r's inside the parentheses and then the e raised to the -2r?
 
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  • #2
You would solve it numerically.
 

1. What is the median of a probability distribution?

The median of a probability distribution is the value that separates the data into two equal halves. In other words, half of the data points are above the median and half are below. It is often used as a measure of central tendency in a dataset.

2. How do you solve for the median of P(r) with exponential terms?

To solve for the median of P(r) with exponential terms, you first need to find the cumulative distribution function (CDF) of the probability distribution. Then, set the CDF equal to 0.5 and solve for the value of r. This value of r will be the median of P(r).

3. Can the median of P(r) with exponential terms be negative?

Yes, the median of P(r) with exponential terms can be negative. This is because exponential terms can have both positive and negative values, so the median can fall on either side of the origin.

4. What is the relationship between the mean and median of P(r) with exponential terms?

The mean and median of P(r) with exponential terms are not always equal. In fact, the mean can be significantly different from the median, especially when the data is skewed. The mean is influenced by extreme values, while the median is not affected by outliers.

5. How is the median of P(r) with exponential terms affected by changes in the distribution parameters?

The median of P(r) with exponential terms is affected by changes in the distribution parameters, specifically the rate parameter. As the rate parameter increases, the median shifts towards the right and vice versa. However, changes in the shape parameter do not affect the median as it only scales the distribution, not the location of the data.

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