Suppose a random variable X has a probability density function in img.jpg.  a. Find the value of k that makes this a probability density function. b. Find P(0.4≤X≤1). c. Find P(X≤0.4|X≤0.8) d. Find F(b) = P(X≤b) and sketch the graph of this function.

MATLAB: An Introduction with Applications
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Suppose a random variable X has a probability density function in img.jpg. 

a. Find the value of k that makes this a probability density function.

b. Find P(0.4≤X≤1).

c. Find P(X≤0.4|X≤0.8)

d. Find F(b) = P(X≤b) and sketch the graph of this function.

**Mathematical Function Description:**

The function \( f(x) \) is defined as follows:

- For values of \( x \) in the range \( 0 \leq x \leq 1 \), the function is given by:
  \[
  f(x) = kx(1 - x)
  \]
- For values of \( x \) outside this range (i.e., elsewhere), the function is defined as:
  \[
  f(x) = 0
  \]

**Explanation:**

- This is a piecewise function where the behavior of \( f(x) \) changes depending on the value of \( x \).
- Within the interval from 0 to 1, \( f(x) \) is a quadratic expression that depends on the parameter \( k \).
- Outside the interval from 0 to 1, the function has a constant value of 0.

This setup is often used in mathematical contexts where the function is only relevant or has meaningful values within a certain range.
Transcribed Image Text:**Mathematical Function Description:** The function \( f(x) \) is defined as follows: - For values of \( x \) in the range \( 0 \leq x \leq 1 \), the function is given by: \[ f(x) = kx(1 - x) \] - For values of \( x \) outside this range (i.e., elsewhere), the function is defined as: \[ f(x) = 0 \] **Explanation:** - This is a piecewise function where the behavior of \( f(x) \) changes depending on the value of \( x \). - Within the interval from 0 to 1, \( f(x) \) is a quadratic expression that depends on the parameter \( k \). - Outside the interval from 0 to 1, the function has a constant value of 0. This setup is often used in mathematical contexts where the function is only relevant or has meaningful values within a certain range.
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