An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 180 engines and the mean pressure was 7.5Ibs/square inch. Assume the standard deviation is known to be 0.9. If the valve was designed to produce a mean pressure of 7.7 lbs/square inch, is there sufficientevidence at the 0.05 level that the valve does not perform to thespecifications?State the null and alternative hypotheses for the above scenario.AnswerrHo:Ha:KeypKeyboard ShorTables

μ=7.7, σ=0.90n=sample size=180, X¯=7.5

Answered: An engineer has designed a valve that…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A coin-operated drink machine was designed to discharge a mean of 8 fluid ounces of coffee per cup. In a test of the machine, the discharge amounts in 22 randomly chosen cups of coffee from the machine were recorded. The sample mean and sample standard deviation were 8.11 fluid ounces and 0.19 fluid ounces, respectively. If we assume that the discharge amounts are approximately normally distributed, is there enough evidence, to conclude that the population mean discharge, μ, differs from 8 fluid ounces? Use the 0.05 level of significance. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H and the alternative hypothesis H₁. : (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) 0 (d) Find the p-value. (Round to three or more decimal places.) (e)…
A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 435 gram setting. It is believed that the machine is underfilling the bags. A 35 bag sample had a mean of 427 grams. Assume the population standard deviation is known to be 17. A level of significance of 0.05 will be used. State the null and alternative hypotheses.
A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is 45 milligrams. You want to test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 43.9 milligrams. Assume the population is normally distributed and the population standard deviation is 6.4 milligrams. At a 0.09, can you reject the company's claim? Complete parts (a) through (e). me &B. The critical values are + 1.70 nts Identify the rejection region(s). Choose the correct answer below. ok OA. OB. C. Contents Fail to reject Ho- Fail to reject Ho Fail to reject Ho- t: 0 Reject Ho Reject Ho Reject Ho Reject Ho- edia Library 0. Plan (c) Find the standardized test statistic. for Success (Round to two decimal places as needed.) ssible Resources (() More Is for Success Clear all Check answer View an example Get more help Help me solve this Terms of Use Privacy Policy Permissions I Contact Us 54°F A Ca Convright C…
Acrylic bone cement is sometimes used in hip and knee replacements to fix an artificial joint in place. The force required to break an acrylic bone cement bond was measured for six specimens under specified conditions, and the resulting mean and standard deviation were 306.03 newtons and 41.95 newtons, respectively. Assuming that it is reasonable to believe that breaking force under these conditions has a distribution that is approximately normal, estimate the mean breaking force for acrylic bone cement under the specified conditions using a 95% confidence interval. (Round your answers to three decimal places.) n USE SALT
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 160160 engines and the mean pressure was 7.17.1 pounds/square inch (psi). Assume the population standard deviation is 1.01.0. If the valve was designed to produce a mean pressure of 6.96.9 psi, is there sufficient evidence at the 0.010.01 level that the valve performs above the specifications? Step 4 of 6 : Find the P-value of the test statistic. Round your answer to four decimal places.
The average American consumes 86 liters of alcohol per year. Does the average college student consume more alcohol per year? A researcher surveyed 10 randomly selected college students and found that they averaged 92 liters of alcohol consumed per year with a standard deviation of 16 liters. What can be concluded at the the αα = 0.05 level of significance? The null and alternative hypotheses would be: Ho=?H1=? The test statistic t=? (please show your answer to 4 decimal places.)
The heights of adult females are approximately normally distributed, with an estimated mean of 65.0 inches and an estimated standard deviation of 3.00. Some researchers hypothesized that the actual standard deviation, o, of heights of adult females is greater than 3.00. These researchers chose a random sample of 20 adult females. The mean height of this sample was 64.9 inches, and the standard deviation was 3.44. Is there enough evidence to conclude, at the 0.1 level of significance, that the standard deviation of adult female heights is greater than 3.00? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H1. p Ho :0 H, :0 (b) Determine the type of test statistic to use. (Choose one) ▼ D=0 OSO (c) Find the value of the test statistic. (Round to three or more…
The manufacturer of a particular brand of tires claims they average at least 50,000 miles before needing to be replaced. From past studies of this tire, it is known that the population standard deviation is 8,000 miles. A survey of tire owners was conducted. From the 23 tires surveyed, the mean lifespan was 43500 miles. Using alpha = 0.05, can we prove that the data in inconsistent with the manufacturers claim? We should use a t v test. What are the correct hypotheses? Ho: Select an answer v| ? v H Select an answer | ? v Based on the hypotheses, find the following: Test Statistic= p-value- The correct decision is to Select an answer The correct conclusion would be: Select an answer Question Help: M Message İnstructor Submit Question MacBook Pro FR.I END.S DD F8 F9 F10 F11 F12 F7 & 8 9 delete
Acrylic bone cement is sometimes used in hip and knee replacements to fix an artificial joint in place. The force required to break an acrylic bone cement bond was measured for eight specimens under specified conditions, and the resulting mean and standard deviation were 306.11 newtons and 41.94 newtons, respectively. Assuming that it is reasonable to believe that breaking force under these conditions has a distribution that is approximately normal, estimate the mean breaking force for acrylic bone cement under the specified conditions using a 95% confidence interval. (Use a table or technology. Round your answers to three decimal places.) n USE SALT
A gallon of paint claims to cover 400 sq ft. This feels too high. To test this, a research lab obtained 30 random gallons of paint and recruited 30 volunteers to each paint as much wall space as they could with a gallon, and the lab techs measured the area covered. They computed a mean of 396 sq ft with a standard deviation of 27 sq ft. They performed a test of hypothesis and computed a p-value of 0.212. What is the appropriate conclusion?

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS