Solve the problem.Fifteen SmartCars were randomly selected and the highway mileage of each was noted. The analysis yielded a mean of 47 miles per gallonand a standard deviation of 5 miles per gallon. Which of the following would represent a 90% confidence interval for the average highwaymileage of all SmartCars?O 47 ± 1.345-O 47 + 1.761-V15O 47 + 1.645-15O 47 + 1.753-547 ±Next Solve the problem.Sales of a new line of athletic footwear are crucial to the success of a company. The company wishes to estimate the average weekly salesof the new footwear to within $300 with 90% reliability. The initial sales indicate that the standard deviation of the weekly sales figures isapproximately $1100. How many weeks of data must be sampled for the company to get the information it desires?O 23 weeksO 10,915 weeksO 7 weeksO 37 weeks

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Answered: Solve the problem. Fifteen SmartCars…

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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In a sample of 7 observations, the values are 17, 11, 12, 13, 14, 15. 16. Find the 95% confidence interval for the population mean. O A. (5.00, 9.00) O B. (4.00, 8.00) OC (12.00, 16.00) OD.(11.00, 15.00)
From the population of 540, a sample of 60 induvidual is taken from this sample. Tge mean is found to be 6.2 and the standerd deviation is 1.368. Find the estimated standerd error of the mean. Construct a 96%confidence intervels for the mean
A mountain climber plans to buy some ropes to use as a lifeline. Which of the following would be a better one? Rope A: with a mean breaking strength of 500 LBS and standard deviation of 100 LBS or Rope B: with a mean breaking strength of 500 LBS and standard deviation of 10 LBS Explain
When forming a confidence interval for matched-pair data the point estimate is the Select one: O A. standard deviation of the differences. OB. differences of the standard deviations. O C. mean of the differences. O D. difference of the means.
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Participant Keyboard A Keyboard B Keyboard C Keyboard D A 6. 3. -- 4 4 -- -- E 4 6. -- -- Are the data enough to conclude that there are significant differences in typing performance among the four keyboard designs. Test with a = .05. 2. 3.
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
A study of 4 bolts of carpet showed that their average length was 76.2 yards and the sample standard deviation was 5.6 yards. Which of the following is the 80% confidence interval for the mean length per bolt of carpet? O A. 75.8 to 76.6 O B. 72.62 to 79.78 O C. 71.61 to 80.79 D. 75.40 to 77.00
Consider the following service system. The average inter-arrival time is 10 minutes, and the standard deviation of the inter-arrival time is 10 minutes. The average processing time is 5 minutes with the standard deviation of the processing time being 6 minutes. What is the value of Iq? What is the value of I?
The average speed of 64 random cars traveling on a certain highway was 80 km/h and the sample standard deviation was 20 km/h. What is the margin of error with a 98% level of confidence for the population average speed? Select one: а. 1.295 b. 2.387 C. 6.64 d. 3.2375 е. 2.656 f. 5.9675
The management of a national automobile manufacturer advertises a free transmission if it fails. The management expects transmissions will be normally distributed with a mean of 65,000 miles and a standard deviation of 2,146 miles. If management wants to give free transmission replacements to at most one percent of its automobile purchasers, at what mileage should warranty state replacement?

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