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an experiment measuring the percent shrinkage on drying of 50 clay specimen produced the following data ;
13.4 17 18.4 20.1 21.2
13.9 17.4 18.5 20.2 21.2
14.2 17.5 18.5 20.3 21.2
14.8 17.6 18.7 20.3 21.2
15.4 17.6 19 20.4 21.4
15.6 17.8 19.3 20.5 22.3
15.8 18 19.4 20.5 23.1
16.4 18.2 19.6 20.6 23.1
16.6 18.2 19.6 20.8 23.6
16.6 18.3 19.7 20.8 24
results mean = 18.95, mode=21.2, median=19, std dev= 2.5 variance =6.27
a) group the data into class interval of size 1% starting with the value 13.0 and draw the resulting histogram.
b)For the grouped data acting as of each of the data point in an interval was actually located at the midppoint of that interval, compute the sample mean,variance and standard deviation and compare with the results above.
A blimp is approximated by a by a sphere of 25 m in diameter. Estimate the weight of 15°C gas within the blimp for (a) helium at 1.1 atm; and (b) air at 1.0 atm. What might the difference between these two values represent
A direct shear cell 25.4cm x 25.4 cm in plan is filled with dry sand. a normal load of 6kN is applied to the sample, and the shear failure is 3.5kN. What is the anle of internal friction for the sand?
Two wells had been drilled on 40-acre spacing. Well 1 is injectionand Well 2 is producing well. Down hole injection pressure is 8500psi, and bottom hole pressure in producing well is 2400 psi.
The reference current for the DAC0808 is 2.0 mA. With the DAC output connected to the inverting input of an op amp with a feedback resistor of 5.0 kohms, what is the op amp output voltage with a digital input of 0x80
Determine the mass flowrate through boiler needed to produce 5000KW of power.
Search the web or visit a local drawing office to find a commercially available structural analysis package (or one that you are already familiar with). Describe, using your own words, the following features of the package:
At the end of the 6 years, the oil company exercised its option and bought the vessel. The chemical company has a 34% incremental tax rate. Compute its after-tax rate of return on the vessel.
What force is necessary to lift a thin 25-mm diameter ring out of :
question 1as an estimator in a construction firm you have been instructed to include only the costs relating to labour
The solid compound shaft, made of three di¤erent materials, carries the two torques shown. (a) Calculate the maximum shear stress in each material. (b) Find the angle of rotation of the free end of the shaft.
Two materials (wrought iron, ks = 0.046 mm, and galvanized iron, ks = 0.15 mm) are being considered for a new pipeline. The expected discharge is 0.15 m3/s. Both the head loss and cost are sought for.
If john borrows $6346.40 now to buy a car (the car does not include the down payment) and makes monthly payments of $220 for 36 months beginning one month from now
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