Confidence interval for the standard deviation
Find the 90% confidence interval for the standard deviation for the time it takes an inspector to check a bus for safety if a sample of 27 buses has a standard deviation of 6.8 minutes. Assume the variable is normally distributed.
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What percentage of hydrogen molecules have a speed within 1.00 m/s of the most probable speed? Root mean square velocity is 1882.7 m/s and most probable speed is 1537.2.
On 2003 august 27, mars was in opposition as seen from the Earth. On 2005 July 14 (687 days later), mars was in western quadrature as seen from the earth. a. What was the distance of Mars from the Sun on these dates, measured in astronomical
A researcher is interested in estimating the average salary of police officers in a large city. She wants to be 99% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired informa
A parallel-plate capacitor is formed from two circular 12.5-cm-diameter plates spaced 1.0 mm apart. The electric field strength between the two plates is 3000000 N/C. What is the charge (in nC) on the positive plate?
For Binomial distribution with n = 10 and probability of success p = 0.4 find probability of less than 3 successes (x < 3) (3 is not included).
Your friend who works for the college radio station must make electric-field measurements for a report to be filed with the station's application for license renewal.
Find the 95% confidence interval for the variance of the weights of containers of motor oil if a sample of 14 containers has a variance of 3.2. Assume the variable is normally distributed.
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