Part a)
P ( 0 < Z < 1.9 ) = P ( Z < 1.9 ) - P ( Z < 0
)
P ( 0 < Z < 1.9 ) = 0.9713 - 0.5
P ( 0 < Z < 1.9 ) = 0.4713
part b)
P ( -2.54 < Z < 0 ) = P ( Z < 0 ) - P ( Z < -2.54
)
P ( -2.54 < Z < 0 ) = 0.5 - 0.0055
P ( -2.54 < Z < 0 ) = 0.4945
Part c)
P ( -0.98 < Z < 0.06 ) = P ( Z < 0.06 ) - P ( Z <
-0.98 )
P ( -0.98 < Z < 0.06 ) = 0.5239 - 0.1635
P ( -0.98 < Z < 0.06 ) = 0.3604
Part d)
P ( Z < -2.76 ) = 0.0029
Part e)
P ( Z > -0.94 ) = 1 - P ( Z < -0.94 )
P ( Z > -0.94 ) = 1 - 0.1736
P ( Z > -0.94 ) = 0.8264
(1 point) Assume that the readings on the thermometers are normally distributed with a mean of...
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