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A new concrete mix is being designed to provide adequate compressive strength for concrete blocks. The specification for a particular application calls for the blocks to have a mean compressive strength greater than 1350 kPa. A sample of 100 blocks is produced and tested. Their mean compressive strength is 1356 kPa and their standard deviation is 70 kPa. A test is made of H o: 1350 versus H 1: > 1350.
(a) Find the p-value.
(b) Do you believe it is plausible that the blocks do not meet the specification, or are you convinced that the blocks meet specification? Explain your reasoning.
Station 3 + 54.67 must be marked in the field. if the steel tape to be used is only 99.98 under standard conditions and if the temperature is 87 degree farenheit at the time of the measurement, how far away from the existing station mark at 0 + 79.23..
a reinforced concrete beam with a section of 12 inches width and 24 inches depth is reinforced with 3no. 9 bars. fc'=5000psi and fy=60000psi. a 2 inch cover is used and the beam has a simply supported span lenght of 15ft.
The base engine develops 200 ft-lb of torque, and a modified version of the engine develops 240 ft-lb of torque. If the overall gear reduction ratio is 8 to 1, what is the maximum acceleration from rest (in ft/sec^2) for.
Saturated liquid water is in an adiabatic compressor with inlet and outlet pressures of 100 kPa and 1 Mpa. The isentropic efficiency is 85%. Find the work input (kj/kg) and entropy generation (kj/ kg K).Do the same for saturated vapor steam in an adi..
two solid cylindrical rods are joined at B and loaded as shown rod AB is made of steel(E=200 GPa) and rod BC of brass ( E = 105GPa) determine a) the total deformation of composite rod ABC, b) the deflection of point B
A 1-m^3 volume tank contains a mixture of 18.32 moles of oxygen, 16.40 moles of Nitrogen, and 6.15 moles of carbondioxide. What is the partial pressure of each gass componet at 25 degrees
At what depth will 400 cfs flow uniformly in an earth lined (n = 0.025) trapezoidal canal of base width 15 ft having side slopes 1 on 3 if the canal is laid on a slope of 1 in 10,000.
A steel bar serving as a vertical hanger to support heavy machinery in a factory is attached to a support by the bolted connection. The main part of the hanger has a rectangular cross section with width b1 = 1.5 in. and thickness t = 0.5 in.
determine the width of the flume to be used such that the depth of flow immediatly upstream of the throat under design conditions is 1 m. By what percentage is the capacity of the flume reduced if the downstream depth is 0.85m
Suppose that you issued a query against a search engine and the search engine retrieved 125 documents. Suppose that there are total, Define Data mining confusion matrix
A first order reaction takes place in a batch reactor to remove an undesired contaminant (compound A) from a drinking water. The rate constant = 2.0 per day. The initial concentration = 75mg/L.
a 5 inch inside diameter well is to be placed to a total depth of 60 m in an unconfined sand aquifer. the saturated
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