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MATLAB: An Introduction with Applications

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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## Survey Analysis and Confidence Intervals

Find the margin of error and 95% confidence interval for the following surveys. Round all answers to 2 decimal places.

### (a) Survey of 500 People on Voting Intentions

A survey of 500 people finds that 42% plan to vote for Smith for governor.

- **Margin of Error (as a percentage):** [__________] %
- **Confidence Interval:** [__________] % to [__________] %

### (b) Survey of 1500 People on Supporting Stricter Penalties

A survey of 1500 people finds that 31% support stricter penalties for child abuse.

- **Margin of Error (as a percentage):** [__________] %
- **Confidence Interval:** [__________] % to [__________] %

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