Data from a National Health Survey show that men’s average weight is normally distributed with a mean of?

Dexter Dicostanzo: a. z = (180-170)/30 = 0.333, P[z>0.333] = .3696 b. sd =30/√100 =3, z =10/3 =3.33, P[z>3.33] = .0004 c. by symmetry with (b), .0004