Find the expected value for the random variable. 2 3. 4 5 P(x)| 03 0.1 0.4 0.2 O 4.5 O 3.5 3.1 O 3.7

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
icon
Related questions
Topic Video
Question
**Find the expected value for the random variable.**

Here is a table representing a discrete probability distribution:

| \( x \)  | 2   | 3   | 4   | 5   |
|----------|-----|-----|-----|-----|
| \( P(x) \) | 0.3 | 0.1 | 0.4 | 0.2 |

To calculate the expected value \( E(X) \), use the formula:

\[ E(X) = \sum [x_i \cdot P(x_i)] \]

- \( E(X) = (2 \times 0.3) + (3 \times 0.1) + (4 \times 0.4) + (5 \times 0.2) \)
- \( E(X) = 0.6 + 0.3 + 1.6 + 1.0 \)
- \( E(X) = 3.5 \)

**Answer Options:**

- ○ 3.1
- ○ 3.5
- ○ 3.7
- ○ 4.5

The correct answer is 3.5.
Transcribed Image Text:**Find the expected value for the random variable.** Here is a table representing a discrete probability distribution: | \( x \) | 2 | 3 | 4 | 5 | |----------|-----|-----|-----|-----| | \( P(x) \) | 0.3 | 0.1 | 0.4 | 0.2 | To calculate the expected value \( E(X) \), use the formula: \[ E(X) = \sum [x_i \cdot P(x_i)] \] - \( E(X) = (2 \times 0.3) + (3 \times 0.1) + (4 \times 0.4) + (5 \times 0.2) \) - \( E(X) = 0.6 + 0.3 + 1.6 + 1.0 \) - \( E(X) = 3.5 \) **Answer Options:** - ○ 3.1 - ○ 3.5 - ○ 3.7 - ○ 4.5 The correct answer is 3.5.
Expert Solution
Step 1

The formula for mean is given by the formula μ=EX=xifxi.

steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Discrete Probability Distributions
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, calculus and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Calculus: Early Transcendentals
Calculus: Early Transcendentals
Calculus
ISBN:
9781285741550
Author:
James Stewart
Publisher:
Cengage Learning
Thomas' Calculus (14th Edition)
Thomas' Calculus (14th Edition)
Calculus
ISBN:
9780134438986
Author:
Joel R. Hass, Christopher E. Heil, Maurice D. Weir
Publisher:
PEARSON
Calculus: Early Transcendentals (3rd Edition)
Calculus: Early Transcendentals (3rd Edition)
Calculus
ISBN:
9780134763644
Author:
William L. Briggs, Lyle Cochran, Bernard Gillett, Eric Schulz
Publisher:
PEARSON
Calculus: Early Transcendentals
Calculus: Early Transcendentals
Calculus
ISBN:
9781319050740
Author:
Jon Rogawski, Colin Adams, Robert Franzosa
Publisher:
W. H. Freeman
Precalculus
Precalculus
Calculus
ISBN:
9780135189405
Author:
Michael Sullivan
Publisher:
PEARSON
Calculus: Early Transcendental Functions
Calculus: Early Transcendental Functions
Calculus
ISBN:
9781337552516
Author:
Ron Larson, Bruce H. Edwards
Publisher:
Cengage Learning