Question

In: Statistics and Probability

2. The inside diameters of bearings used in an aircraft landing gear assembly are known to...

2. The inside diameters of bearings used in an aircraft landing gear assembly are known to
have a standard deviation of s = 0.002 cm. A random sample of 15 bearings has an
average inside diameter of 8.2535 cm.
a. Test the hypothesis that the mean inside bearing diameter is 8.25 cm. Use a two-
sided alternative and a = 0.05.
b. Find the P-value for this test.
c. Construct a 95% two-sided confidence interval on the mean bearing diameter
d. Repeat (a,b,c) above for a = 0.1. Compare with results for a = 0.05.
e. Repeat (a,b,c) above for a = 0.01. Compare with results for a = 0.05.

Solutions

Expert Solution


Related Solutions

The inside diameters of bearings used in an aircraft landing gear assembly are known to have...
The inside diameters of bearings used in an aircraft landing gear assembly are known to have a standard deviation of σ = 0.002 cm. It is found that a random sample of 15 bearings has an average inside diameter of 8.2514 cm. Test the hypothesis that the mean inside bearing diameter is 8.25 cm, Use two side alternative and α = 0.05.
“Main landing gear of each aircraft is used to absorb the load of the aircraft in...
“Main landing gear of each aircraft is used to absorb the load of the aircraft in landing/ take-off and also weight of it while it is on ground. After reaching its flight cycle, it needs to overhaul to keep aircraft safe. Write an essay how to inspect, clean and lubricate the bearing of main landing gear during maintenance. Make sure the procedure is complete.”
“Main landing gear of each aircraft is used to absorb the load of the aircraft in...
“Main landing gear of each aircraft is used to absorb the load of the aircraft in landing/ take-off and also weight of it while it is on ground. After reaching its flight cycle, it needs to overhaul to keep aircraft safe. Write an essay how to inspect, clean and lubricate the bearing of main landing gear during maintenance. Make sure the procedure is complete.”
19. An aircraft manufacturer requires bolts that are part of the landing gear assembly to have...
19. An aircraft manufacturer requires bolts that are part of the landing gear assembly to have a mean diameter of 1.1 inches with a variance of no more than 0.04 inches2. The bolts are purchased from an outside supplier. A random sample of 30 bolts from a recently received shipment yielded a variance of 0.054 inches2. Should the shipment be returned? Perform the appropriate test of hypothesis using alpha = 0.05. (15 points) T est Statistic = ______________ Reject Region:...
The diameters of a batch of ball bearings are known to follow a normal distribution with...
The diameters of a batch of ball bearings are known to follow a normal distribution with a mean 4.0 in and a standard deviation of 0.15 in. If a ball bearing is chosen randomly, find the probability of realizing the following event: (a) a diameter between 3.8 in and 4.3 in, (b) a diameter smaller than 3 9 in, (c) a diameter larger than 4.2 in.
An example of a superalloy/composites that could be used to build a landing gear for a...
An example of a superalloy/composites that could be used to build a landing gear for a space rocket like new shepherd(blue origin)
Fire hoses used in major structure fires have inside diameters of 2.500 in (1 in =...
Fire hoses used in major structure fires have inside diameters of 2.500 in (1 in = 2.54 cm). The nozzle of the fire hose have an inside diameter of 1.200 in. When firefighters are fighting a fire 2020.007 cm above the ground, the pressure in the nozzle is less than at ground level. When measured, the gauge pressure in the nozzle is 0.000 Pa. (a) How are the firefighters able to fight a fire with zero water pressure? Explain your...
Fire hoses used in major structure fires have inside diameters of 2.500 in (1 in =...
Fire hoses used in major structure fires have inside diameters of 2.500 in (1 in = 2.54 cm). The nozzle of the fire hose have an inside diameter of 1.200 in. When firefighters are fighting a fire 2020.007 cm above the ground, the pressure in the nozzle is less than at ground level. When measured, the gauge pressure in the nozzle is 0.000 Pa. (a) How are the firefighters able to fight a fire with zero water pressure? Explain your...
Two processes are used to produce forgings used in an aircraft wing assembly. Of 200 forgings...
Two processes are used to produce forgings used in an aircraft wing assembly. Of 200 forgings selected from process 1, 10 do not conform to the strength specifications, whereas of 300 forgings selected from process 2, 20 are nonconforming. Test the hypothesis that the two processes have identical fractions nonconforming. Use ? = 0.05. State your hypothesis and test statistic.
1. Why are components made from steel or aluminum alloy used on aircraft? 2. For each...
1. Why are components made from steel or aluminum alloy used on aircraft? 2. For each of the following suggest a part on an aircraft that needs that particular material property: hardness, strength, elasticity, placidity, ductility, toughness, and brittleness. 3. Explain in why exceeding the yield point causes permeant stain, and how that is measured and calculated. 4. What do the temperatures on 1 & 2 of the iron– Carbon phase diagram indicate, shown in the presentation? What is the...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT