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A population of values has a normal distribution with = 155.9 = 155.9 and = 67.2 = 67.2 . You intend to draw a random
A population of values has a normal distribution with
=
155.9
=
155.9
and
=
67.2
=
67.2
. You intend to draw a random sample of sizen
=
20
n
=
20
.
Find the probability that a single randomly selected value is less than 112.3.
P(X< 112.3) =
Find the probability that a sample of sizen
=
20
n
=
20
is randomly selected with a mean less than 112.3.
P(M< 112.3) =
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