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Suppose that the minimum and maximum ages for typical textbooks currently used in college courses are 2 and 8 years. Use the following rule of thumb to estimate the standard deviation.
Standard deviation =
Rule of thumb : Standard Deviation is about {Max-Min}/{4}
Find the size of the sample required to estimate the mean age of textbooks currently used in college courses. Assume that you want 94% confidence that the sample mean is within 0.1 year of the population mean.
a cylinder with a 6.0 in diameter and 12.0 in length is put under compression load of 150 kips. the modulus of
1. list three engineering components applications that in your judgment need high stiffness and low weight. what
what is the effect of quenching on the transition temperature and toughness for the mild steel ?
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according to archimedes principle the mass of a floating object equals the mass of the fluid displaced by the object. a
draw and dimension the bar diagram for a 3 38 in. shaft with a class 3 fit. draw and dimension a typical hole and shaft
on the basis of the information given ,is it possiple to compute the magnitude of the load that is necessary to produce this change in length?
an air conditioning system is used to maintain a house at 20 degrees celcius when the outside temperature is 35 degrees
a wire has a length of 7.20 10-2 m and is used to make a circular coil of one turn. there is a current of 3.60 a in the
a droplet of water diameter 100 um is falling through 20oc air at the terminal velocity of 0.298 ms. the relative
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