MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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![**Study on Video Game Duration Featuring Substance Use**
Twelve different video games featuring substance use were observed. The duration times of gameplay (in seconds) are listed below. The study is designed for the sample to be treated as a simple random sample. The goal is to use this data to construct a 99% confidence interval estimate for σ, the standard deviation of gameplay duration times. It is assumed that this sample is from a population with a normal distribution.
**Gameplay Duration Times (seconds):**
- 4,241
- 4,086
- 3,962
- 4,900
- 4,300
- 4,714
- 3,810
- 4,755
- 3,935
- 4,933
- 4,646
- 4,407
To find the confidence interval, you may need to refer to a table of Chi-Square critical values.
**Confidence Interval Estimate:**
The estimate is given in the form:
\[ \text{Confidence interval estimate is } \square \text{ sec} < \sigma < \square \text{ sec} \]
*Note: Round to one decimal place as needed.*](https://content.bartleby.com/qna-images/question/042a8735-5c88-4898-a930-fc7b8d4f9458/0fc73ad8-d70f-44fd-b52e-333c823fdd04/w1eyz6y_processed.jpeg)
Transcribed Image Text:**Study on Video Game Duration Featuring Substance Use**
Twelve different video games featuring substance use were observed. The duration times of gameplay (in seconds) are listed below. The study is designed for the sample to be treated as a simple random sample. The goal is to use this data to construct a 99% confidence interval estimate for σ, the standard deviation of gameplay duration times. It is assumed that this sample is from a population with a normal distribution.
**Gameplay Duration Times (seconds):**
- 4,241
- 4,086
- 3,962
- 4,900
- 4,300
- 4,714
- 3,810
- 4,755
- 3,935
- 4,933
- 4,646
- 4,407
To find the confidence interval, you may need to refer to a table of Chi-Square critical values.
**Confidence Interval Estimate:**
The estimate is given in the form:
\[ \text{Confidence interval estimate is } \square \text{ sec} < \sigma < \square \text{ sec} \]
*Note: Round to one decimal place as needed.*
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