What is the area under the normal curve between z = -1.0 and z = -2.0?

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Answer 1 · 2018-06-24T07:59:01

#0.1359#

for a normal distribution

#Z~N(0,1)#

#P(-2 < Z <-1)=P(1 < Z < 2)#

by symmetry of the curve

#=P(Z <2 )-P(Z<1)#

from tables

#=0.9772-0.8413#

#=0.1359#