A random sample of 50 suspension helmets used by motorcycle riders and automobile race- car drivers was subjected to an impact test, and on 18 of these helmets some damage was observed.

(a) Test the hypothesis, H0: p = 0.3 versus H1: p > 0.3 with a = 0.05.

(b) Find the P-value for this test.

(c) Find a 95% two-sided traditional CI on the proportion of helmets of this type that would show damage from this test. Explain how this confidence interval can be used

to test the hypothesis in part (a).

(d) Using the point estimate of p obtained from the preliminary sample of 50 helmets, how many helmets must be tested to be 95% confident that the error in estimating the true value of p is less than 0.02?

(e) How large must the sample be if we wish to be at least 95% confident that the error in estimating p is less than 0.02, regardless of the true value of p?

Determine the maximum tensile and compression stresses in : A 6ft wide, 10ft high vertical rectangular gate has its top edge 6ft below the water level. it is hinged along its lower edge. what force, acting on the top edge, is necessary to hold the gate shut? |

When the local mean time at los angeles : The longitude of Albany, New York, is +73 degrees 44' 49" and the longitude of Los Angeles, California, is +118 degrees 10' 44". When the local mean time at Los Angeles is 10h 41m 00s a.m., the local mean time at Albany is |

Calculate the height of water in the standpipe after 4 hours : A falling-head permeability test is being conducted on a saturated sample of clayey silt having hydraulic conductivity of 6.5 x 10-9 m/s. The diameter and the length of the sample are 100 mm and 150 mm |

Determine the volume flow rate per unit width and the shear : Determine the volume flow rate per unit width amd tje shear stress of the upper plate (Start with the full, three-dimensional Navier-Stokes equations and the continuity equation, simplify them, and then solve them |

How large must the sample be if we wish to be at least : How large must the sample be if we wish to be at least 95% confident that the error in estimating p is less than 0.02, regardless of the true value of p? |

What is the temperature of the small vessel at the end of : A small nitrogen container is at Pressure P1 = 5 bar and T1 = 300 K. It's been filled from a larger nitrogen container, which is P= 10 bar and T = 300 K. The filling process ends when pressure in the small container |

Determine whether the crystal structure for this alloy is : Some hypothetical alloy is composed of 12.5 wt% of metal A and 87.5 wt% of metal B. If the densities of metals A and B are 4.27 and 6.35 g/cm3, respectively, whereas their respective atomic weights are |

Determine the total amount of heat transfer from the : Liquid propane is commonly used as a fuel for heating homes, powering vehicles such as forklifts, and filling portable picnic tanks. Consider a propane tank that initially contains |

Determine the rate of ammonia nh4-n utilization and the : Determine the rate of ammonia (NH4-N) utilization and the biomass growth rate for the following conditions: |

## Determine the maximum detector spacing by drawingImagine a virtual expressway having 3 lanes. The administrating agency wants to detect traffic accidents in 5 minutes wherever they occur to dispatch an emergency response unit. |

## Calculate how much water would the aquifer produceThe specific storage of a 45-m thick confined aquifer is 3.0 X 10^-5 m^-1. How much water would the aquifer produce if the piezometric surface is lowered by 10 m over an area of 1 km^2 |

## Why are viruses difficult to remove from water supply systemCompare the relative contributions of a treated water supply and the collection, treatment and disposal of human wastes towards the control of epidemic diseases in developing countries. |

## Determine the rate of flow-unconfined aquiferIn an unconfined aquifer having K = 30/m/day, two observation wells, 3km apart, have water levels of 50 and 40 m, respectively, above the base of the aquifer. Determine the rate of flow. |

## Determine the tension in cable cd over the smooth square rodMember ABC is supported by cable CD and a square collar at A that fits loosely over the smooth square rod. Determine the tension in cable CD. The smooth rod is fixed at its base and cannot rotate. |

## Find the specific heat capacity of iron at steady statean iron cube at 400 degrees Celsius is dropped into a insulated bath containing 10kg of water 25 degrees Celsius. the water finally reaches a temperature of 50 degrees Celsius at steady state. |

## Estimate shaft elongation in millimeters with applied forceA 4.00-cm-diameter, 0.80-m long rod of aluminum 7075-T6 is subjected to an axial tensile force with a factor of safety of 1.75. The yield stress and modulus of elasticity of aluminum 7075-T6 are 500. MPa and 210. GPa, respectively. |

## Question 1figure 1 shows a large crawler crane in operationquestion 1figure 1 shows a large crawler crane in operation in a construction sitefigure 1nbspnbsp crawler |

## What is the probability that the entire system is successfulAssume the components act independently and that they are equivalent in the sense that all 3 of them have an 85% success rate. Consider the random variable X as the number of components out of 3 that fail. |

## Determine the maximum allowable length of the boxA square yellow-brass bar must not stretch more than 2.5 mm when it is subjected to a tensile load. Knowing that E = 1.5 GPa and that the allowable tensile strength is 150 MPa |

## Determine the total power generation potential of the riverA river flows towards a lake with a velocity of 3 m/s and rate of 500 m3/s at a location of 90 m above the lake surface. Determine the total power generation potential of the river at that location. |

## Determine the radius of wheels neglecting rolling resistanceIf the coefficient of kinetic friction between the 12.5 mm diameter axles and the wheels is mu_k = .3, determine the radius of the wheels. neglect rolling resistance of the wheels on the surface. |

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd