DITO VOLTE111.ll llOD: 26|| 8:10TNT VOLTEB/sSLU SEA -.ODULE 6Problem 3A tire manufacturer claims that the average life of a certain grade of tire is greater than 25,000miles under normal driving conditions on a car of a certain weight. A random sample of 15 tiresis tested. A mean and standard deviation of 27,000 and 5000 miles, respectively, are computed.Assume that the lives of the tires in miles are approximately normally distributed. Can weconclude from these data that the manufacturer's product is as good as claimed? Use a .05 levelof significance.Problem 4A market research firm is interested in the amount that households in a certain town spend onRSIT

A manufacturer claims that an average life of a tire is 25000 miles or more. A sample of n = 15 tire…

Answered: A tire manufacturer claims that the…

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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The seasonal output of a new experimental strain of pepper plants was carefully weighed. The mean weight per plant is 17.0 pounds, and the standard deviation of the normally distributed weights is 1.75 pounds. Of the 200 plants in the experiment, how many produced peppers weighing between 13 and 16 pounds?
Maple trees in a large forest have heights that are normally distributed with a mean of 95 feet and a standard deviation of 4.7 feet. One tree has a height of 92 feet. What is the Z-score of this height?
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the night shift than on the day shift. The mean number of units produced by a sample of 52 day-shift workers was 327. The mean number of units produced by a sample of 58 night-shift workers was 332. Assume the population standard deviation of the number of units produced on the day shift is 23 and 31 on the night shift. At the 0.05 significance level, is the number of units produced on the night shift larger? Is this a one-tailed or a two-tailed test? State the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places. What is your decision regarding H0?
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the night shift than on the day shift. The mean number of units produced by a sample of 59 day-shift workers was 323. The mean number of units produced by a sample of 67 night-shift workers was 333. Assume the population standard deviation of the number of units produced on the day shift is 19 and 27 on the night shift. At the 0.10 significance level, is the number of units produced on the night shift larger? Is this a one-tailed or a two-tailed test? multiple choice 1 One-tailed test Two-tailed test State the decision rule. (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.) Compute the value of the test statistic. (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.) What is your decision regarding H0? multiple choice 2 Do…
The lengths of nails produced in a factory are normally distributed with a mean of 3.343.34 centimeters and a standard deviation of 0.070.07 centimeters. Find the two lengths that separate the top 3%3% and the bottom 3%3%.
Assume that the heights of men are normally distributed with a mean of 68.1inches and a standard deviation of 2.8 inches. If 64 men are randomly selected, find theprobability that they have a mean height greater than 69.1 inches.
The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 53 and a standard deviation of 8. Using the empirical rule (as presented in the book), what is the approximate percentage of lightbulb replacement requests numbering between 37 and 53?Do not enter the percent symbol.ans = %
In a certain country the heights of adult men are normally distributed with a mean of 70.2 inches and a standard deviation of 2.7 inches. The country's military requires that men have heights between 66 inches and 79 inches. Determine what percentage of this country's men are eligible for the military based on height. The percentage of men that are eligible for the military based on height is nothing%. (Round to two decimal places as needed.)
Rhys is a quality control manager at a facility that manufactures snack foods. He is interested in the number of whole mini- pretzels that are in the 10 oz bags in the latest lot produced. Rhys selects 24 bags of mini-pretzels at random from the latest lot and counts the number of pretzels in each bag His sample has a mean of 158 pretzels with a standard deviation of 1.6 pretzels. What is the margin of error with 95% confidence (2 = 2.07)? O 0.02 O 66.76 O 0.68 O 6.34
I wanted to do a market research study estimating the average hourly wage earned by childcare workers in the bay area. How large does my sample need to be in order to have a margin of error that is less than $0.50 with a 95% confidence in the result. Assume that the standard deviation of the wages is $2 per hour.
The average cost of tuition, room and board at small private liberal arts colleges is reported to be $8,500 per term, but a financial administrator believes that the average cost is higher. A study conducted using 350 small liberal arts colleges showed that the average cost per term is $8,745 with a standard deviation of $1,200. Let = 0.05., what is our decision about the average cost? Select one: a.Less than $8,500 b.Greater than 8500 c.None is correct d.Not equal to $8,500 e.Equal to $8,500
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