Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:30 P.M. on a weekday. Use the sample data to construct a 99% confidence interval estimate of the population standarddeviation606464566452595859686266 DClick the icon to view the table of Chi-Square critical values.The confidence interval estimate is mi/h

We have given that, The data set are : 60, 64, 64, 56, 64, 52, 59, 58, 59, 68, 62, 66 Then, We…

Answered: Listed below are speeds (mi/h) measured…

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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A random sample of 9 fields of rye has a mean yield of 39.4 bushels per acre and standard deviation of 4.09 bushels per acre. Determine the 95% confidence interval for the true mean yield. Assume the population is approximately normal. Step 2 of 2: Construct the 95% confidence interval. Round your answer to one decimal place.
Engineers randomly select 8 of the parachutes and measures the "tearing strengths" of each parachute canopy. The sample mean is 21.7 Newtons, and the standard deviation is 0.23 Newtons. Construct a 99.7% confidence interval for the true mean tearing strength of the parachutes. Round the numbers to 1 decimal place.
A sample of 80 University night school students' ages was obtained in order to estimate the mean age of all night school students. The sample mean was 25.1 years, with a sample variance of 16.2. a. Give the point estimate for µ, the population mean, along with the margin of error. b. Calculate the 99% confidence interval for µ.
Find the critical value tc for a 95% confidence level when the sample size is 18. Use Table 4 on page A10 (Appendix) A. 1.740 B. 2.110 C. 2.101 D. 1.734
In a random sample of 60 refrigerators, the mean repair cost was $111.00 and the population standard deviation is $16.40. Construct a 95% confidence interval for the population mean repair cost. Interpret the results. Construct a 95% confidence interval for the population mean repair cost. The 95% confidence interval is ( D. (Round to two decimal places as needed.)
A poll was conducted that asked 1010 people how many books they had read in the past year. Results indicated that x= 10.5 books and s= 16.6 books. Construct a 99% confidence interval for the mean number of books people read. Click the icon to view the table of areas under the t-distribution. Construct a 99% confidence interval for the mean number of books people read. (Use ascending order. Round to two decimal places as needed.)
In a sample of seven cars, each car was tested for nitrogen oxide emissions (in grams per mile). The results appear below. Assuming that nitrogen oxide emissions are normally distributed, 4. Car 1 2 3 4 5 6 7 Nitrogen oxide emission (g/mi) 0.13 0.18 0.15 0.09 0.12 0.18 0.08 a. Construct a 95% confidence interval for the mean amount of nitrogen oxide emissions for all cars. b. What effect would increasing the level of confidence have on the length of the interval?
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96
A poll was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x= 14.3 books and s= 16.6 books. Construct a 90% confidence interval for the mean number of books people read. E Click the icon to view the table of areas under the t-distribution, Construct a 90% confidence interval for the mean number of books people read. ) (Use ascending order. Round to two decimal places as needed.)
In a random sample of ten people, the mean driving distance to work was 25.5 miles and the standard deviation was 7.3 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean μ. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.) Construct a 90% confidence interval for the population mean. (...) (Round to one decimal place as needed.) Interpret the results. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) OA. % of all random samples of ten people from the population will have a mean driving distance to work (in miles) that is between the interval's endpoints. OB. It can be said that % of the population has a driving distance to work (in miles) that is between the interval's endpoints. OC. With % confidence, it can be said that most driving distances to…

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