Use the given information to find the number of degrees of freedom, the critical values x2 and x2, and the confidence interval estimate of o. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 80% confidence; n = 25, s=0.21 mg. Click the icon to view the table of Chi-Square critical values. (Type a whole number.) (Round to three decimal places as needed.) X=(Round to three decimal places as needed.) The confidence interval estimate of o is |mg
Use the given information to find the number of degrees of freedom, the critical values x2 and x2, and the confidence interval estimate of o. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 80% confidence; n = 25, s=0.21 mg. Click the icon to view the table of Chi-Square critical values. (Type a whole number.) (Round to three decimal places as needed.) X=(Round to three decimal places as needed.) The confidence interval estimate of o is |mg
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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Transcribed Image Text:**Title: Estimating Confidence Intervals for Population Standard Deviation**
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**Objective:**
Use the given information to find the number of degrees of freedom, the critical values \( \chi^2_L \) and \( \chi^2_R \), and the confidence interval estimate of \( \sigma \). It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution.
**Given Data:**
- Confidence Level: 80%
- Sample Size (\(n\)): 25
- Sample Standard Deviation (\(s\)): 0.21 mg
**Instructions:**
1. **Degrees of Freedom (df):**
- Enter the calculated whole number.
2. **Critical Value \( \chi^2_L \):**
- Round to three decimal places as needed.
3. **Critical Value \( \chi^2_R \):**
- Round to three decimal places as needed.
4. **Confidence Interval Estimate for \( \sigma \):**
- The confidence interval is in the form {lower bound} mg < \( \sigma \) < {upper bound} mg.
- Round to two decimal places as needed.
**Additional Resources:**
- Click the icon to view the table of Chi-Square critical values to determine the appropriate critical values based on the degrees of freedom and the confidence level.
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**Note:**
The image contains a text section that assists with calculating a confidence interval for the population standard deviation using the Chi-Square distribution. Users are expected to input data derived from statistical tables and formulas based on the sample characteristics.
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