The breaking strengths of cables produced by a certain manufacturer have a mean, u, of 1775...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
The breaking strengths of cables produced by a certain manufacturer have a mean, u, of 1775 pounds, and a standard deviation of 60 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 30 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1805 pounds. Assume that the population is normally distributed. Can we support, at the 0.01 level of significance, the claim that the mean breaking strength has increased? (Assume that the standard deviation has not changed.) Perform a one-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places, and round your responses as specified in the table. (If necessary, consult a list of formulas.) The null hypothesis: #, :0 The alternative hypothesis: H, : O=D The type of test statistic: (Choose one) v ローロ ロ<ロ The value of the test statistic: (Round to at least three decimal places.) The p-value: (Round to at least three decimal places.) Can we support the claim that the mean breaking strength has increased? Yes O No The breaking strengths of cables produced by a certain manufacturer have a mean, u, of 1775 pounds, and a standard deviation of 60 pounds. It is claimed that an improvement in the manufacturing process has increased the mean breaking strength. To evaluate this claim, 30 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1805 pounds. Assume that the population is normally distributed. Can we support, at the 0.01 level of significance, the claim that the mean breaking strength has increased? (Assume that the standard deviation has not changed.) Perform a one-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places, and round your responses as specified in the table. (If necessary, consult a list of formulas.) The null hypothesis: #, :0 The alternative hypothesis: H, : O=D The type of test statistic: (Choose one) v ローロ ロ<ロ The value of the test statistic: (Round to at least three decimal places.) The p-value: (Round to at least three decimal places.) Can we support the claim that the mean breaking strength has increased? Yes O No
Expert Answer:
Related Book For
Thermodynamics An Engineering Approach
ISBN: 978-0073398174
8th edition
Authors: Yunus A. Cengel, Michael A. Boles
Posted Date:
Students also viewed these mathematics questions
-
The breaking strengths of cables produced by a certain manufacturer have a mean, , of 1850 pounds, and a standard deviation of 60 pounds. It is claimed that an improvement in the manufacturing...
-
It is known that diskettes produced by a certain company will be defective with probability .01, independently of each other. The company sells the diskettes in packages of size 10 and offers a...
-
The number of defective components produced by a certain process in one day has a Poisson distribution with mean 20. Each defective component has probability 0.60 of being repairable. a. Find the...
-
McIntyre Industries Work in Process Inventory account had a $68,000 beginning balance on May 1 ($40,000 of this related to direct materials used during April, while $28,000 related to conversion...
-
"Because non sampling errors are greater in magnitude than sampling errors, it really does not matter which sampling technique is used." Discuss this statement.
-
A lighthouse beacon alerts ships to the danger of a rocky coastline. a. According to the lighthouse keeper, with what speed does the light leave the lighthouse? b. A boat is approaching the coastline...
-
Stevenson Company's trial balance as of December 31, 2022 shows \($35,000\) for inventory; but the balance sheet shows \($33,000.\) Assuming no inventory shrinkage, what is the most likely reason for...
-
Air entrainment in a draining tank (Figure 3A.7) a molasses storage tank 60 ft in diameter is to be built with a draw-off line 1 ft in diameter, 4 ft from the sidewall of the tank and extending...
-
A portfolio manager is considering the purchase of a bond with a 5.5% coupon rate that pays interest annually and matures in 3 years. If the required rate of return on the bond is 5%, the price of...
-
Dairy Services was organized on August 1, 20Y2. A summary of the revenue and expense transactions for August follows: Fees earned ..................................... $627,600 Wages expense...
-
True Or False A plaintiffs peculiar characteristics may be taken into consideration in evaluating the defendants conduct for purposes of the tort of intentional infliction of emotional distress.
-
True Or False A plaintiff is not required to subject themself or their property to harm in order to extricate themself from confinement.
-
True Or False A defendant must retreat before using deadly force to protect themself when their home is invaded.
-
True Or False In deciding whether a conversion has been committed, the only thing the courts consider is the extent and duration of the defendants control of the property.
-
True Or False With conversion the plaintiff can recover even if the defendant made an innocent mistake.
-
Figure Q1 show a 35kg ball pull by a force of 250 N horizontally to the ring A. Determine the dimension d if the system is in equilibrium.and the force in cable AC is zero. B 3.5 m C d 4 m FIGURE Q1...
-
In Problems 718, write the augmented matrix of the given system of equations. f0.01x0.03y = 0.06 [0.13x + 0.10y = 0.20
-
Helium gas is compressed from 27C and 3.50 m3/kg to 0.775 m3/kg in a reversible and adiabatic manner. The temperature of helium after compression is (a) 74C (b) 122C (c) 547C (d) 709C (e) 1082C
-
Reconsider Prob. 17-68. Using EES (or other) software, solve the problem for the inlet conditions of 0.8 MPa and 1200 K. Prob. 17-68. Air at 900 kPa and 400 K enters a convergingnozzle with a...
-
A 9-cm-diameter spherical ball whose surface is maintained at a temperature of 1108C is suspended in the middle of a room at 208C. If the convection heat transfer coefficient is 15 W/m2C and the...
-
One molecule of ATP provides 0.30 eV when it is used to power cellular processes. Photosynthesis in a typical plant requires 8 photons at 550 nm to produce 1 molecule of ATP. What is the overall...
-
A study of photosynthesis in phytoplankton in the open ocean used short pulses of laser light to trigger photosynthetic reactions. The investigators system used 0.10 mW pulses of 640 nm laser light...
-
Greg and Jan are married and file a joint tax return. They have two children: Ben and Kelly. Ben, age 20, was a full-time student during the current year and had scholarships of \($12,000.\) Greg and...
Study smarter with the SolutionInn App