Using only the clt and the numbers of yes and no voters in our sample of 400,compute (algebraically) a numberapproximate_sdthat’s the predicted standard deviation of thearrayresample_yes_proportionsacc ording to the central limit theorem. do not access thedata inresample_yes_proportionsin any way. remember that a predicted standard deviationof the sample means can be computed from the population sd and the size of the sample

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?