X 0 1 2 3 P(x) 0.15 0.05 0.2 0.6 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places Question Help: Message instructor Submit Question Jump to Answer

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Transcription for Educational Website:

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**Find the Standard Deviation of a Probability Distribution**

The following table provides the probability distribution for a random variable \( x \):

| \( x \) | \( P(x) \) |
|--------|------------|
| 0      | 0.15       |
| 1      | 0.05       |
| 2      | 0.2        |
| 3      | 0.6        |

**Problem Statement:**

Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places.

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**Instructions for Calculating Standard Deviation:**

1. Calculate the mean (\( \mu \)) of the distribution.
2. Use the formula for the standard deviation (\( \sigma \)) of a probability distribution:
   \[
   \sigma = \sqrt{\sum (x_i - \mu)^2 \cdot P(x_i)}
   \]
3. Ensure your answer is rounded to at least two decimal places.
Transcribed Image Text:Transcription for Educational Website: ----- **Find the Standard Deviation of a Probability Distribution** The following table provides the probability distribution for a random variable \( x \): | \( x \) | \( P(x) \) | |--------|------------| | 0 | 0.15 | | 1 | 0.05 | | 2 | 0.2 | | 3 | 0.6 | **Problem Statement:** Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places. [Input Box] **Question Help:** - Message instructor **Buttons:** - [Submit Question] - [Jump to Answer] ----- **Instructions for Calculating Standard Deviation:** 1. Calculate the mean (\( \mu \)) of the distribution. 2. Use the formula for the standard deviation (\( \sigma \)) of a probability distribution: \[ \sigma = \sqrt{\sum (x_i - \mu)^2 \cdot P(x_i)} \] 3. Ensure your answer is rounded to at least two decimal places.
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