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An April 2009 survey of 2253 American adults conducted by the Pew Research Center's Internet & American Life Project revealed that 1262 of the respondents had at some point used wireless means for online access. 1 Calculate an interpret a 95% CI for the proportion of all American adults who at the time of the survey had used wireless means for online access. 2 What sample size is required if the desired width of the 95% CI is to be at most 0.04, irrespective of the sample results? 3 Does the upper limit of the interval in (a) specify a 95% upper confidence bound for the proportion being estimated?
what should be the minimum radius of curvature p for the track at B so that the passengers do not experience a normal force greater than kmg?neglect the size of the car and passengers.Take k=4
A four lane freeway (two lanes in each direction) operates at capacity during the peak hour. It has 11-ft lanes, 4-ft shoulders, and there are three ramps within three miles upstream of the segment midpoint and four ramps within three miles downst..
the block is fitted between the fixed supports. if the glued joint can resist a maximum shear stress of T(allow)=2ksi, determine the temperature rise that will cause the joint to fail. Take E= 10(10^3)ksi, v=0.2
You are the winner of a sweepstakes and given a choice of a one-time payment of $1,000,000 or a guaranteed $80,000 per year for 20 years. Assume that you will collect all 20 years regardless of health condition.
Identify the forces that work against the success of cladding systems in keeping the elements out.
The blower on an air conditioning unit produces 80 cubic feet per minute of air in the ductwork. What is the air flow in cubic meters per hour
After the Chernobyl accident, the concentration of 137Cs in milk was proportional to the concentration of 137Cs in the glass that cow consumed. The concentration in the grass was, in turn, proportional to the concentration in the soil.
A particle which moves in two-dimensional motion has coordinates given in inches by x=t^2-4t+20 and y=3sin2t, where the time t is in seconds. Determine the magnitudes of the velocity v and the acceleration a and the angle between these two vectors..
What is the salt usage for each regeneration if the system regenerated every 10 days? What size resin tanks (diameter, height) would be required for a duplex system with no redundancy?
A 600 MWe power plant has an efficiency of 36% with 15% of the waste heat being released to the atmosphere as stack heat and the other 85% taken away in the cooling water.
Ask question ellipse construction via foci method
An open clean glass tube, having a diameter of 3 mm is inserted vertically into a dish of mercury at 20c .How far will the column of mercury (S.G =13.6) in the tube be depressed in (mm) given the following information. Theta = 130 and surface tens..
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