Company A has implemented new technologies to decrease the manufacturing costof products. The old cost was $5.6 per unit. In order to find out whether the newtechnologies are effective or not, we decided to perform a hypothesis test at thesignificance level of 0.05. We collected a sample of 36 products and found theaverage cost is $5.5, and the sample standard deviation of the cost is $1.2. Pleasefirst choose the correct set of hypotheses and then choose the correct test statistics.HO: mean > 5.6H1: mean <= 5.6HO: mean = 5.6H1: mean 5.6HO: mean <= 5.6H1: mean > 5.6HO: mean >= 5.6H1: mean < 5.6HO: mean < 5.6H1: mean >= 5.6HO: mean 5.6H1: mean = 5.6%3D

Answered: Image /qna-images/answer/9d8de2b0-d4c8-4ea5-9d51-099af3df7ae5.jpg

Answered: Company A has implemented new…

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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Louis is managing sales agents at a call center. The company expects agents to make 20 cold calls per hour with a standard deviation of 4 calls. He samples 35 of his employees, and finds that they made an average of 23 calls. Louis wants to know if his employees’ calls are significantly different than the company’s expectations at the 2% significance level. What are the null and alternate hypotheses?
A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 433 gram setting. It is believed that the machine is underfilling or overfilling the bags. A 11 bag sample had a mean of 428 grams with a standard deviation of 26. Assume the population normally distributed. A level of significance of 0.05 will be used. Specify the type of hypothesis test.
A discount airline allows staff 36.0 minutes between flights to clean the aircraft interior. The aircraft workers union claims that that average time that it takes to this cleaning is more than 36.0 minutes. They want to carry out a hypothesis test. They take a random sample n = 40 flights and time how long it takes to carry out the cleaning. They find that the sample mean is 36.66 minutes and the sample standard deviation is 5.56 minutes. Calculate the test statistic for this test and enter your answer below. Give your answer to 2 decimal places.
The U.S. Postal Service (USPS) is faced with the issue of a large portion of mail (letters and packages) that cannot be delivered because of an illegible or non-existent address. USPS would like to find out if there is any evidence that the proportion of undeliverable mail has significantly decreased since last year when it was 6%. Which of the following are the correct null and alternative hypotheses for this test? Select one: a. Ho: p = 0.06 versus Ha:p> 0.06 b. Ho: p 0.06 ge Next page Moodle Accessibility Specification Coastal Carolina University (CCU) does not discriminate on the basis of race, color, religion, sex, sexual orientation, genc national origin, age, genetic information, mental or physical disability, or status as a disabled or Vietnam-era veteran in it programs, activities or employment practices. For more information related to discrimination, please contact Title IX, Titl office phone 843-349-2382: FEN email eenarnastal adur or thel Dent of Education office for…
A company with a large fleet of cars hopes to keep gasoline cost down and sets a goal of attaining a fleet average of greater than 26 miles per gallon. To see if their goal is being met, they check the gasoline usage of 50 company trips, finding a mean of 27.01 miles per gallon. Define the relevant parameter, state the null and alternative hypothesis, and test at the 5% significance level to see whether this sample provides evidence that the company is meeting its goal. The standard error from the randomization distribution under the null hypothesis is SE = 0.68.
Two treatments for a new infectious disease have been developed to reduce hospitalizations. Each treatment was given to different groups of patients. Treatment 1 was given to 65 people. Subjects of treatment 1 had a mean hospital stay of 5.6 days with a standard deviation of 2.6 days. Treatment 2 was given to 54 people. Subjects of treatment 2 had a mean hospital stay of 8.4 days with a standard deviation of 3.0 days. Use the method of hypothesis testing to test the claim that the mean time in the hospital for treatment 1 is shorter than the mean time in the hospital for treatment 2 assuming a 0.05 significance level. (a) List the null and alternative hypotheses for this test. (b) Compute the value of the test statistic (c) Determine the rejection region.(d) Determine whether or not we can reject the null hypothesis.
A real estate company is trying to estimate the cost of rent in Houston. They randomly sample 10 apartment buildings and find that the mean monthly rent payment is $980, with a standard deviation of $250. Construct a 99% confidence interval for the true mean monthly rent payment in Houston. Find the Lower end and the Upper end.
your company has just installed a new computer data entry system and you must determine the new input error rates. Management requires you to report the error rates within 0.5% at a 95 confidence level. What sample size do you need if the population standard deviation is 1.2%.
A poll asked whether states should be allowed to conduct random drug tests on elected officials. Of 21,327 respondents, 56% said "yes." a. Determine the margin of error for a 99% confidence interval. b. Without doing any calculations, indicate whether the margin of error is larger or smaller for a 90% confidence interval. Explain your answer. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. a. The margin of error for a 99% confidence interval is (Round to three decimal places as needed.) b. Without doing any calculations, indicate whether the margin of error is larger or smaller for a 90% confidence interval. A. The margin of error will be smaller for a 90% confidence interval. B. The margin of error will be about the same for a 90% confidence interval. C. The margin of error will be larger for a 90% confidence interval. D. There is insufficient information to determine the…
Suppose a recent study of Trucks and SUVs gave an average fuel efficiency of 19.2 mpg for Trucks and 21.4 mpg for SUVs. The sample standard deviation for Trucks was 3.2 mpg and 2.8 mpg for SUVs. These results were based on samples of 35 Trucks and 39 SUVs. At the 1% significance level, can we conclude that, on average, SUVs have better fuel efficiency than Trucks? Clearly state the null and alternative hypotheses, use the critical value approach (draw a detailed picture), and write out a detailed conclusion. Organize: Hypotheses: Detailed picture: Detailed conclusion:

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