For the data set 1, 7, 7, 7, 8, the mean is 6. What is the mean absolute
deviation?
A. The me...
Mathematics, 20.05.2021 20:10 BradFarquharson472
For the data set 1, 7, 7, 7, 8, the mean is 6. What is the mean absolute
deviation?
A. The mean absolute deviation is 6.
OB. The mean absolute deviation is 10.
ооо
C. The mean absolute deviation is 2.
D. The mean absolute deviation is 5.
Answers: 2
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Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .
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