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MATLAB: An Introduction with Applications
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ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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n=11, ¯x¯(x-bar)=45, and s=8, construct a confidence interval at a 80% confidence level. Assume the data came from a
Give your answers to one decimal place.
< μ <
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- A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 4 points with 99% confidence assuming s = 18.7 based on earlier studies? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required? A Click the icon to view a partial table of critical values. A 99% confidence level requires subjects. (Round up to the nearest subject.)arrow_forwardDescribe about the Confidence Interval for μD.arrow_forwardHeights for teenage boys and girls were calculated. The mean height for the sample of 47 boys was 185 cm and the variance was 58. For the sample of 66 girls, the mean was 174 cm and the variance was 69. There is no reason to assume the variances would be equal. Estimate how much taller teenage boys are using a 87% confidence level. Express this in the (point estimate) ± (margin of error) format. Round answers to 2 decimal places. Harrow_forward
- In each of Exercises, we have presented a confidence interval (CI) for the difference, µ1 - µ2, between two population means. Interpret each confidence interval. 99% CI is from -10 to 5.arrow_forwardFind the critical t-value that corresponds to 70% confidence. Assume 7 degrees of freedom.arrow_forwardFind the z critical value associated with 85% confidence.arrow_forward
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- Heights for teenage boys and girls were calculated. The mean height for the sample of 51 boys was 183 cm and the variance was 66. For the sample of 71 girls, the mean was 173 cm and the variance was 61. There is no reason to assume the variances would be equal. Estimate how much taller teenage boys are using a 87% confidence level. Express this in the (point estimate) ± (margin of error) format. Round answers to 2 decimal places. Harrow_forwardIn each of Exercises, we have presented a confidence interval (CI) for the difference, µ1 - µ2, between two population means. Interpret each confidence interval. 99% CI is from -20 to 15.arrow_forwardIf n=24, (x-bar)=44, and s=18, construct a confidence interval at a 98% confidence level. Assume the data came from a normally distributed population. Give your answers to one decimal place.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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