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Mathematics, 06.07.2019 05:30 gavincoscarat760
Aci is desired for the true average stray-load loss m (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. assume that stray-load loss is normally distributed with ļæ¼ = 3.0
a. compute a 95% ci for m when n 5 25 and x 5 58.3.
b. compute a 95% ci for m when n 5 100 and x 5 58.3.
c. compute a 99% ci for m when n 5 100 and x 5 58.3.
d. compute an 82% ci for m when n 5 100 and x 5 58.3.
e. how large must n be if the width of the 99% interval for m is to be 1.0?
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) ā sinh2(x) = 1 and (b) 1 ā tanh 2(x) = sech 2(x). solution (a) cosh2(x) ā sinh2(x) = ex + eāx 2 2 ā 2 = e2x + 2 + eā2x 4 ā = 4 = . (b) we start with the identity proved in part (a): cosh2(x) ā sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 ā sinh2(x) cosh2(x) = 1 or 1 ā tanh 2(x) = .
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Aci is desired for the true average stray-load loss m (watts) for a certain type of induction motor...
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