32. Suppose that the reaction time (sec) to a certain stimulus is a continuous random variable with a density function given by f(x) = {k/x for 1 ≤x≤ 10 otherwise a. Sketch a graph of f(x). b. Find the numerical value of k. c. What is the probability that x exceeds 3? d. What is the probability that x lies within .25 sec of 3?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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32. Suppose that the reaction time (sec) to a certain stimulus is a continuous random variable with a density function given by 

\[ 
f(x) = 
\begin{cases} 
\frac{k}{x} & \text{for } 1 \leq x \leq 10 \\
0 & \text{otherwise} 
\end{cases} 
\]

a. Sketch a graph of \( f(x) \).

b. Find the numerical value of \( k \).

c. What is the probability that \( x \) exceeds 3?

d. What is the probability that \( x \) lies within .25 sec of 3?
Transcribed Image Text:32. Suppose that the reaction time (sec) to a certain stimulus is a continuous random variable with a density function given by \[ f(x) = \begin{cases} \frac{k}{x} & \text{for } 1 \leq x \leq 10 \\ 0 & \text{otherwise} \end{cases} \] a. Sketch a graph of \( f(x) \). b. Find the numerical value of \( k \). c. What is the probability that \( x \) exceeds 3? d. What is the probability that \( x \) lies within .25 sec of 3?
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